I recently bought an Adler 30-1, one of the green ones, maybe from the '70's. Hasn't been used for 40+ years according to the previous owner who couldn't get it to work. I cannot get the timing set right. The lead edge of the shuttle carrier simply comes short of lining up with the needle slot (per the mechanic's manual) no matter how I set the racks and pinion/drive gear. The adjusting cam in the bell crank eye does not have enough range. It seems like the drive rack is about 1/4" too long, the shuttle drive is an incorrect part, or the bell crank is bent, but there's no evidence of that and its pretty robust, hard to see how that could get bent. Overall the machine is very tight, no slop in the bearings, gears, etc. The mechanics manual I have is for a 30-10 and I think that's different from a 30-1. Does anyone have a 30-1 mechanics manual? Constabulary posted one, along with an owners guide back in 2014 but those links are now dead. I've seen images of shuttle drives that are a full 8 tooth as well as partial 4 tooth ones like mine. Which is correct for a 30-1? Could I have a Singer drive that "fits" but has different shuttle alignment than does an Adler drive? Only fix I can come up with is to fabricate a new adjusting cam that has a greater eccentric throw, and that seems to be a really odd thing to have to do. All suggestions will be greatly appreciated! Thanks.