I have a 101 70# and I just bought a used 101 60# and this thing is impossible to tune. I have it tuned but the limb driver is shifted to the left of center creating a hell ofa problem with my surelok sight especially ifI extend it out there 8". The bow appears to be in perfect condition but it has me worried now. I got it sighted in but I had to jimmy an extra portion of the octogon tubing on the scope to get it to extend far enough. This is really frustrating. My 70# shoots great at center (i.e. limbdriver setting in the very bottom of the shelf). Any suggestions or possible tests to see if there is any bent components???