When Hans phoned me if I was available for a tour, this turned out to be a win-win-situation as he was looking for an alternative for his deleted weekend-camp-kayak-tour and I was looking for an one-day opportunity to continue testing the Silhouette. I would like to mention that the pictures below were made by Hans Heupink: thx again Hans.
We thought that the weather&sea could be interesting as the wind had been blowing hard the night before.
We started at Springersdiep in Zeeland and we had a nice paddling day. Hans paddling his AnasAcuta being of the same hard-chine kayak-family as the Silhouette.
We expected a sea being rough, but at the moment we made our first paddlestrokes, the wind started "dying" till approx. 4-5Bft. 
How does the sea look like today? :
well at first we had a regular sea with waves up to 30cm. After reaching the buoys, marking the new restricted nature-reserve area, we paddled in the direction of the Lighthouse at Ouddorp where we entered an area with crossing, irregular waves of approx. 40cm gradually increasing to the north.
There was an interesting area with Clapotis up to 1meter at the end of the sandplate Aardappelenbult. Probably this is the result of waves from opposite directions and waves starting to crest on shallow water. But it seems logical that the increasing current at that spot helps also to build up an interesting sea. We explored this area for about an hour (at approx. 5hrs after the high tide) and even found a kind of tidal rapid, complete with a (small) frontwave.
And how does the Silhouette perform in these waters?
Well, underneath I will write down my notes of today on stability, skeg function, manoeuvrability and a bit of miscellaneous remarks.
About the stability I wrote before that the initial stability is not very high. Today it worked out like Arnold said, that you have to rely on the secondary stability at sea. This worked very well in the waves at the beginning of our tour when the waves were not coming from several directions. However when we were exploring the area with the crossing waves and clapotis, I noticed that my hips were very much at work while compensating for the irregular waves. No problem as I was able to paddle quite relaxed. But I must confess that I was not able to make photos like Hans did from his AnasAcuta because I didn't like to put away my paddle for a second. With a paddle in my hands I could rest, while not paddling, letting one blade floating lightly on the water as a stabiliser; a technique you also use with a K1-racer when not paddling.
It seems that under these sea-conditions the theory that the secondary stability takes over in case of low initial stability, does not work always like that and you must be able to keep your balance. Anyhow, after paddling for about an hour under these conditions, I noticed that my hips and lower back had become tired, resulting in a stiff back; not a pleasant feeling. Interesting is that I only once before had a experience like this: during the test of the Vestvika a few years ago. This was at the very same spot with similar waves and also in a kayak with a low stability. I guess and hope this is not caused by my back; although this would be rare as I paddled last September a week long in the waters around Anglesea, also not a very quiet spot, without any similar experiences.
About the way the Silhouette reacts on the variable skeg I can not tell much as I paddled the Silhouette without it. The spare cable Arnold gave me to replace the kinked one, was too thick and did not fit. But the good news is that I did not miss the skeg at all. With the 4-5 Bft. SW-wind the kayak reacted quite neutral to the wind without any sign of weathercocking.
Although I would have like to use the skeg when paddling downwind.
Manoeuvrability. In the moderate waves in which I paddled with the Silhouette today, I experienced her as a lively kayak that responded very well to edging and sweepstrokes when I wanted to change or correct my direction. Probably this has something to do with the timing of the sweepstroke because turning is easier on top of a wave. Last time in surf the Silhouette was more difficult to turn unless I could do it on to of a cresting wave. Later I will have to experience this in heavier winds.
Looking at the profile of the Silhouette it is not a surprise to conclude that this kayak will have a good directional stability, as the rocker is almost zero.
Comparing with the AnasAcuta it again is not a surprise that the AnasAcuta is much more manoeuvrable in heavy seas because she has a rocker like a banana.
Further I would like to make the remark that I highly appreciated the seat construction without the usual backband but using a bulb in the bulkhead behind the seat: It is just like you glide into the cockpit using a shoe-lift.
And while paddling, without a backband I felt very free to use much trunk-rotation when paddling fast. This certainly helps paddling faster.
About the speed I can tell that she certainly is much faster than an AnasAcuta. When I started to sprint it did not cost much time to come 100 meter ahead. Even when Hans started sprinting at 9,5km/h in the Anas, I ran out on him fast .
Paddling fast with the Silhouette is a delight for my soul as she splices the waves silkily without much spray.
Summarising, my thoughts about this kayak are that I, for the time being, think that this is not a kayak for the complete beginner unless having a perfect balance feeling in waves. And, I would like to say, being able to brace with the paddle.
To be continued