>
> No, it's like this:
>
> A B C
>
> O----------O-------------------------------O
> Hinge Platen Weight
> shaft

So if I was to use a 8' 2x4 and put the platen post at
the 2' mark I would have an AB of 2 and an AC of 8'.
The multiplier would then be AC/AB = 8/2 = 4 ?

What's the ratio of movement of point B in relation to
point C - if I move C a distance of 2', how far does B
move?

Also, is 30 psi the desired pressure would 20/15 or some
other number do?

I'm beginning to agree with Tom as well. I'd prefer to
save the $250 Cdn but it's the time that's the killer.

Don