The zhik ZKGs are pretty sweet. Keep in mind that all of these boats mentioned are very powerful, a stock N20 wouldn't be lacking in ANY way for your...

How well does it slide? The other option is to take the frame apart and epoxy it together while you are at it.

rehmbo wrote: Total waste of time? This IMO

The 18 is loose footed if that's what you were concerened about. Looks like an SX mast to me.