Just got a Baby Rolleiflex ata very reasonable price, which appeared to work - but testing with scrap film demonstrated that (a) the frame counter doesn't engage all the time and (b) the wind doesn't release after the shutter is fired. Got the cover off to reveal the mechanism and nothing appears to be damaged. I gather this is a problem area on these cameras, so I was hoping someone would be able to give me a clue as to how to proceed.
Not to worry, a bit of head scratching cracked it. (Service sheet 2.02.0403, adjusting lug 'H' - many thanks to the forum owners for posting the service manual.)