I bought this model 30 no dash (I frame) because I couldn't find a 30-1. my only gripe is nothing, my daughter's gripe is the [flat] cylinder latch release, which is why I wanted the 30-1 in the first place; because of the easier use of the later model release...
these are great guns for beginners when the .22lr is no longer a consideration for self defense.
I don't ever want to negate any reason for buying another .32, but the cyl latch is very simple to change.
You need the thumb piece, the round nut (in place of the screw), and the internal bolt with a stud on it instead of the threaded hole.

Or a simpler method:
Get an I or J frame size thumb piece (K, L, & N are too large). Get a lock washer at the hardware store that will fit inside the hole in the new thumb piece and screw it on using the flat latch screw.