Agfa shutter nut

Got a hold of several Agfa Isolette frames and shutters that needed advanced servicing. In order to remove the shutter you have to twist off a nut with slots at the back of the shutter on the inside of the bellows. Didn't have any spanners around that would fit it so I fashioned a very simple tool reinforced with standard 1.4 x 25mm nails that I then filed down to length. The shutters are screwed on with considerable force which is why I used a 3/8" square bit, this is absolutely overkill, but means there is little chance of breakage or slippage.

Printed in PLA which has held up perfectly for my use, but PETG is probably better for long term. The nails provide the "bite" otherwise the shutter nut just sheers off the plastic bits.

My AM8 has always benefited from a 0.12 margin on all gaps and this piece fits snugly to the back of the Isolette shutters, your mileage may vary. It should at any rate completely clear the back lens.