Hi again,
First, although it might seem convenient to sheet your trys'l to the boom end, it would probably be a bad idea. The address below gives good sheeting diagrams, including for storm trys'l. Other sources I have seen recommend sheeting to the boom, but the numbers I get for possible sheet loads seem awfully high; I'd rather bring the loads to very stout blocks on deck. That way you are not adding unseemly loads to the boom, nor are you attempting to rig said sail to the boom in conditions that make it difficult to lie down without hanging on.
As for the reef clewlines, I haven't been able to figure out how to append the photo's I have to this site (compression is not happening). Maybe another time. Meanwhile I agree with Ian that the deadend and clew block should be on the same side, with the former being just aft of the stretched-out clew, and the latter several inches aft, to form a good angle. No problems with pinching or crushing, as the bunt goes outside the tackle.
As for lashing the clew to the boom, this certainly works, but it only accomplishes what geometry can, at the cost of personal risk.
Fair leads,
Brion Toss
http://www.usna.edu/SailingTeam/trai...ilconfig4x.pdf