Originally Posted by billyryanwill
Is this easily fixable through CLA?
Yes it is.
You might be able to ameliorate the problem with tensioning or slacking the offending shutter curtain, but that is a slippery slope, as you have to be sure the shutter capping is the real problem and not mechanical interference of a curtain or a loose curtain tape.
You also need to measure curtain running time, hard to to on cameras that have no open back, so a pro CLA is the best way to go, worth it for a valuable camera like a IIIf and needed on a 65 year old camera, if you plan to use it.