Ndnchf,
You are being Modest, the three .32 Extra Long Converter cases you made both look well done and the photos illustrate what you described in your text.
As to the Residual Nickel Plating, which appears to be mostly from the mouth of the case down to about mid length, it does make the cases visually identifiable as unique and custom made.
As to the need of the rim notch, perhaps just leaving the relief for the 22 rim shallower might reduce the need for it, perhaps by turning the parent case rim base slightly to further expose the 22 rim but still leaving a solid Brass Rim for the extractor to grab.
The 22 rim at most will only crush until the metal is solidly against metal in the rim interior, even less if any priming residue is left after ignition.
Next time you go to the range, please pick up some fired .22RF cases to measure the rim indent on to see how deep it really is crushed to in thickness compared to the rest of the 'as originally formed' rim. That measurement would give an idea of how much to trim the 'flange' of the converter case rim to allow full crush of the 22 Short 'blanked' case rim.
Best Regards,
Chev. William
PS: the photo of the UMC original .32 Extra Long RF cartridge seem to indicate it is an outside lube, and possibly heeled, design bullet similar to the 299153 ones you are using in your rifles already. Chev. William