Have read the previous posts and the article by Matt Miller about cams/rake etc but it isnt helping!

The delrin screws are as tight as they can go (presume there is some corrosion or something built up stopping me-but they are pretty tight anyways!- have pulled out the old ones and replaced all but the spring) and then today as another measure i have been putting bungy around the lower and upper casting ...basically to hold the cam down in place...cam is locked but seems to kick up when we are at speed....also when we fly a hull i can only assume the pressue on only the tip of the rudder causes it to pop up too......having bungy around the casting can create issues when we arrive at the beach too....it also makes it hard to lock the rudders down at first!....i hope someone can understand what i am talking about.....

See i live in New Zealand ...today we had 25-35 knots of wind....and a brand new sail (imported direct from Hobie USA) so looking forward to 2mmorow and the 15-20 knots we are expecting...just wish i could suss the rudder issues!!!!!

Many many thanks!