I just finished the sling and adjustable firing pin. Adjusts across about 90 degrees of angle. The sling came out to 4 feet long. I have to wonder about the effects of having a 4 foot sling on a 2 foot LA.
I also gathered the remaining parts of the frame, though I still need to locate some hardware and such. I'm really looking forward to getting this thing tested, though I will have to start with just a few pounds of CW so wont out throw my local park. Looks like the treb might actually work!