Dear all I'm having a bit of a 'folder' moment. I've had good success with sourcing old Agfa Isolette cameras off the bay and lubricating/re-calibrating them, to the point that most turn into usable cameras. I've now put my hands on my best one yet: an Agfa Record with a Solinar f/4.5 lens (4 elements rather than 3 that are present in the Apotar of my other folders) and Synchro-computer shutter, able to go to 1/500. The problem: the shutter, the Synchro-compur, seems to be doing poorly. The problem is, as it's common with these shutters I hear, the slow speeds. However, sometimes even the fast speeds are problematic: the shutter locks wide open during the exposure. In general, it is very erratic and unreliable. I have tried soaking it in 100% ethanol. It instantly goes back to perfect functionality. Everything works - for a couple of minutes, that is: when the alcohol dries up, the shutter goes back to erratic operation. The solinar lens, which I have removed from the shutter and cleaned/degreased, is in perfect condition: no scratches or any other problem. Would be a pity to leave it there unused due to a non functioning shutter. Which brings me to my question: I have another Agfa record folder with a Prontor-SV shutter and an Apotar lens. This works perfectly well. I don't really *need* the added shutter speeds of the Synchro-compur, so my question is: Could I get rid of the Apotar lens installed on the Prontor, stick the Solinar on the Prontor and install this combo back in my Agfa Record? My worry is that the distance between the glass elements of the Solinar will be slightly different when screwed onto the Prontor - is this the case? The two shutter assemblies seem to be about the same thickness - but I don't know. Any help is appreciated.