I did not think about the angle of the sheet coming off the traveler as it pertains to the degree to which the boom induces mast rotation. Interesting.

One thing which comes to mind immediately: My 5.8 has a straight traveler track, meaning that the angle of the sheet loads, and thus the fore-aft boom pressure, will change as i drop the traveler, tending to induce less forward boom pressure the further i drop the track. Is this problematic? How do other boats get around this?

One solution which comes to mind; would it be stupid, nonsensical, and otherwise idiotic to take the boomlet track system i have currently and place it on the end of the boom, thereby making the sheet-angle geometry adjustable? or am i over thinking/engineering now?

And that all being said, i thought mast rotation was induced by sail loads, not sheet loads; but i am not well-versed in this type of rig.

Glad to hear my thoughts on square-tops requiring a boom echoed. thanks!