Hallelujah!
I was about to become one of those who gave up on the Boss.
I bought mine 2nd hand. Had it running for a while but it got out of adjustment and I couldn't get it running. Double looping and jamming. I followed every youtube video out there. No luck.
I called Tippmann and Jamie spend a lot of time with me and still no luck.
I sent it in and he rebuilt it, replaced 1spring tuned it up and Shazam! It works great.
$45 for tuneup, $5 for spring