Helios front lens cap

Hey!

I modelled a front lens cap for old helios lenses, because I have some of this without caps.
This cap fits all from 44M model, up to 44M-7. (Maybe fit on other lenses have the same diameter, doesn't fit on 44-2 or others that has slimmer top)
I noticed that, sometimes the sibling models have the same diameter on paper, but in reality there can be differences in 0.1mm range, so the cap can fit tightly on one, and little bit loose on other. There is nothing we can do with it until we use rigid material. With tpu or other, you can scale it down a little bit, and because it is flexible it will fit on every single model well.

I printed it on ender 3 with 0.4 nozzle, and came out perfectly, fits well.
Please make sure you are tuning your settings in accordance with your printer's accuracy and material you use. Maybe you have to set offset, or have to scale a little bit. I recommend you that, to print only a part of the ring, and you can try it out, without needed to print the