hehe...chicken
It was 6 degress here today, and blowing 10 m/s
But I had to try it out again today. Well, removing the balast is rubish. It is much harder to make it dive, and the prop cavitates easier when going under.
I have the front planes level. I tried to varie the angle in several positions, but level is best. least drag, and its easier to trim for level sailing under water.
Im going to add more lead today again.
The poor thing struck the bottom several times, lifting out the prop from the water

Here are some pics: