AD3THREE, I installed a bigsby B7 on an Epi les Paul Gold Top, one of the korean ones they made a few years back. The guitar is loosely based on Neil Young's Old Black. I've done it out with a dimarzio firebird pickup in the bridge, stainless stell scratch plate and truss rod cover and a chrome cover for the neck P90. I have always meant to get round to finishing it off (Locking tuners & Actually paint it matt black).
I got a roller style bridge installed which I thought would help with tuning problem but have been left pretty unimpressed with it.
I am a huge Neil Young fan and his guitar has always been one of my favs. The reason i got the Epi in the first place was because Neil's is a modified gold top.
Anyway, the tonepros sounds like a good choice. To be honest I'm not a huge fan of the look of Joe's Bigsby equipped les paul. The Black and chrome of Old black as just too cool looking.
As far as installing goes, you will be left with holes where the stop tail piece once was. I just have too black rubber caps covering those which are mostly hidden under the bigsby. They will look fine once I finally get around to painting the guitar.