in a leading sea with these trim tabs wouldnt you just trim the motor up? I dont have trim tabs at all and always trim motor up to suit leading sea conditions 

 I read it's the connection between the tab switch and the steering wheel that's most important part.

 At less than $200, they are a good cheap alternative to the lencos and bennetts for small boats if you have already tried adjusting weight distribution and/or those hydrofoils that you attach to the anti-cavitation plate on your outboard. I've used them for about 4 years now on a 6m Fibreglass boat and I've only had to replace one gas strut ($50 for a pair) in that time. They fixed a tendancy for the boat to porpoise in certain conditions/speeds. They do create a bit of drag at very slow speeds but I find I get on plane a little faster and can maintain planing at slower speeds than before I installed them.

If you are worried about them keeping the bow down in following seas there is a retractor kit for $70 which pulls them out of the way and allows you to adjust trim using the leg of your outboard as suggested above. I wish I knew about the retractors before as I'll probably have to add more holes to the transom to install them.

Whitworths has the trimtabs and the retractor kits. www.whitworths.com.au/main_itemdetail.asp