As I recall, quickly comparing mine to the Frankenprint the biggest differences were the emitter flange thickness and the nipple height. Both were bigger on the Nicksdad than on the print. The rest aligned pretty well.
In my experience, from the ones I've bought, this is the best:
And this one, from propsplus on eBay is second:
Star Wars Luke Obi Vader Saber Activator Switch Replica Ti19 Ti20 Exactra Calc | eBay
Both need to be shaved, beveled, or the like to fit into a clamp. The Rebel...
I'm not sure. There's a frame that looks like the plug is in profile -- -- with the plugs extending out beyond everything else. My interpretation is there was a metal ring on the black plastic part that's gone missing, but it looks like it didn't shroud the pins.
Interesting. Thanks for that! (I confess my copy of the movie has gone missing. I hope to pick another copy up today.) It seems the idea it should be taken off comes from these two photos, which I'm told are from the prop being auctioned?
There have been a few reference photos posted. I shared one on page 18 -- Limited Run - Darth Maul TPM screen accurate lightsaber prop -- that seems to have the covertec on the underside. It isn't exactly opposite the buttons (which is no surprise, since the buttons themselves aren't aligned)...
At the risk of being a party pooper, Roman's Gen2 bulb clamp flanges have very distinctive sharp corners and I'm not seeing that in any of these shots. I would expect to see evidence of it in this frame in particular. (Edit: Or, on reexamination, maybe I am? Interesting.)