After waiting for various parts to arrive, I was able to do a install of a stag mag (neck) and 500t (bridge) into my Ibby this weekend, both with SD Triple Shots installed. I thought some of the community might be interested in the results.
The Ibby is an RG series, so its body is basswood and it does have a floating trem - I believe these are factors in my overall impression of each pup.
For the Stag Mag, I liked the inner coil tone and parallel tones best. I think they're good for clean passages and clean rhythm work. Neck coil is alright but a I think a little too much "noise" is present due to its location. I found the humbucker sound to very dark and agressive, both clean and dirty. I could see it useful if trying to emulate a late 60's era overdriven sound. Rightly or wrongly, I was expecting to hear hints of vintage Strat-like tonea feom the single coils, but did not - they were simply very clean and articulate.
For the 500t, I was already a fan of its humbucker sound in this particular git, but now w it converted from 2 conductor to 4 conductor (and moved to a short leg plate to boot), I fpund I also liked the inner coil (south) and parallel sounds as well. The inner coil by itself seems good for soft clean picked passages.
When combining them together, I liked most combinations - each in parallel w itself bit in series with each other was very cool for both dirty and clean but admittedly must be used wisely. [edit: I haven't tried every possible combination yet, but the above it was jumped out at me so far]
For a good lead tone using both, I liked the stag mag's inner coil combined in series w the 500t in himbucking mode.
There is definitel little room to work with on the underside of a pickup when affixing the triple shot to it and then having to solder the connections to it.