Just picked up a galaxie deluxe for $26 that's super clean but needs a little fix. The carriage advance mechanism occasionally hangs up on key press and I'm not entirely sure what to do about it.

It's almost as if the tension is too high on the drawband; if I put a little resistance on the carriage while using the space bar it works just fine, but if I give it a tilt in the opposite direction of advance to let gravity do the same thing - no dice. It hangs up.

I've isolated the mechanism. - its a geared wheel that turns with every key press and a plate that has a protrusion that fits the gear. Press key, plate lifts, wheel advances, plate lowers back in to gear. The problem is that the gear is sometimes faster than the plate or rotates imperceptibly too far and the plate hangs up on the gear! It will snap back in to place as soon as I apply very slight pressure in the return direction.

This a simplified explanation of what I see and its hard to take pictures of it - is anyone familiar with this issue? Is it a carriage tension issue or is there some other adjustment I can make?