I'd get some serious range time in with the LEM.
And see if it doesn't win you over.
It's hard to get the conversion kits from DA/SA to LEM.
And some LEM models.
As that's what lots of folks want these days.
I have four LEM guns myself and wouldn't have them any other way.
Actually bought a HK45C DA/SA and a LEM conversion kit.
Because I couldn't find anyone with a HK45C LEM in stock.
If you are dead set on converting back to DA/SA?
It's a handful of parts you can buy separate.
There's instruction and information on HKPRO