OK, so I really messed up. I mounted the lath onto its tiller (its a crossbow) and found that I had mis-remembered the draw length when tillering and it is 2 inches shorter than the draw length I tillered the bow out to, this means that the 110 lb bow is shooting at 70. I like the reduced draw weight as it is really comfortable to draw where the 110lb draw is as much as I can deal with but then the performance at 110 is great but at 70 is pretty anemic. I can only pike about a 1/2 inch off the length of the bow, I could add another layer of sinew, I could even dare to attempt to heat treat the bow but there is a high risk of cooking the sinew, my son suggests building a new tiller and a new lath and having two crossbows for the price of two....What would you guys do??