Got the bike back yesterday with a new version 2 H3 TCU and motor. Shop said it's been keeping the date right for a week and a half. I'll check to be sure but that issue is likely fixed.
New motor is quieter but not silent like my old
Turbo Como 3.0. Only rode the bike for 3 miles so not much of a test.
I've never ridden a SL1 generation bike so don't know how it compares to that sound. Lots of people say the 2s are quieter.