Traditional Gaff Rigging "Rules of Thumb"

[benz]

I'm not sure there is any standard work specific to small schooners--you seem to have the standard resources already. There are schooners of every size and description where I live, and all of them are rigged differently. I think you'll have to figure out the loads and use engineering principles to see what blocks and line to use. You may have to consult with a naval architect to calculate any loads you can't sort out from Skene's or the Apprentice. But don't be afraid to make your rig unique--do your best with the information you have available, and be willing to tweak things as you sail. After thousands of miles with my homemade gaff rig, I'm still tweaking things here and there.
Ben

[Ian McColgin]

The good news is that if you size sheets, halyards, and other running rigging by what's comfortable to hold, what's not too small to pull on comfortably, and you perforce select blocks to fit, it will all be much much stronger than the actual loading requires.

The place where some err is in the attachments to deck and spars. Anchor things well, through bolting robust pad eyes and such to a backing plate where possible.

G'luck