So which one did you end up getting?
I noticed in your sig you have the R&G tail chop...did you have any issues with lining up the 4 screws used to attach the two pieces?
I never purchased one. Decided clipons and a top triple was more important. Plus the more I stare at my bike the more I realize I like the "less is more" look.
As far as the R&G kit YES I had some major issues with the install. The mounting holes that join the two halves together would not align properly. At the front of the two brackets they were contacting causing the brackets to not align.
I solved this issue with a few minutes on the bench grinder and some matching black high temp corrosion resistant wood stove paint. Best looking kit installed IMHO but there were issues with assembly. Installation was flawless though, the conflict was with the parts in the kit itself.
I thought it was an isolated incident but if you have heard of this I guess not.