Very nice modification. That is what makes building such a large part of this hobby. Ability to "tailor" your planes to the way You want it to be.
I don't think you would disturb the authenticity going electric. You need to decide if you want to hear the scream of a 2 stroker with a nice light trail of exhaust or you want a clean oil free buzzing plane? You'll be the one flying her. But you are retracts.... right???

Your workmanship is clean and first rate. I'll be sure to stay on top of this thread.
DM