You can see right next to the wheel are two doodads, one wrapping around the other. the vertical one moves with the spacebar and is supposed-I think- to tug the wraparound one to move the carriage. They don't meet, and it doesn't even touch the other one. Way down deep is a screw that I think may adjust the angle of the vertical one but I can't reach it. I cant seem to get anything attached to either one to create a shim between them either. Nothing stays on that I have at my disposal. I may try buying an alligator clip but it has to be a very small one.
I really really don't want to disassemble the whole thing to get at that screw either. To me that's like removing the engine to change the headlight.