I'm in the middle of installing an Impulse set into my SG, but it is the middle of winter so I am leaving the soldering work until the middle of the day tomorrow (runny nose =/= flowing solder). But I thought you guys might be interested in some aspects of the installation. I modified the 'batwing' pickguard a few years ago so that I could fit pickup rings to protect my open coil pickups and enable easier pickup changes (i.e., without removing the pickguard and bridge, and hence losing the bridge setup). But I found last time that I ended up removing the bridge and pickguard anyway, because I couldn't get the wires to go through without doing that. But this time I drew on some experience installing a front car camera (!) to create a 'fish' from a zip tie and some masking tape that enabled me to get the pickups in without removing the bridge and pickguard. Here are some photos. The guitar has had an alnico War Pig set in it for the last five years. I also cut some coils off of the springs to make it work better with the short legs of the Impulse set (being able to use short leg pickups was another reason why I did the pickup ring mod).
The guitar is a 2007 SG Special Faded Worn Yellow. This finish doesn't have a top coat, hence the wear.
Impulse mounted into a pickup ring
Here you can see the 'fish' I made from a zip tie, taped around the wires so that they will go through smoothly.
Note how I cut the pickguard to allow the legs to pass through instead of having a pickguard mounting. The bridge and tailpiece are TonePros.
I shielded the cavity with snail tape a couple of years ago. Here you see cable with the fish has passed through. Wiring harness is '50s style with 500K CTS pots and 0.022uF World Music PIO caps, Switchcraft switch and jack. I had some problems with the jack hot wire grounding on the shielding so I added some electrical tape a couple of years ago.
Here I've got the neck pickup in and have removed the zip tie and masking tape.
Both pickups successfully mounted without removing the pickguard. Note that I bought black height adjustment screws rather than using the BKP screws, which stand out like dog's balls.
It was too cold in the garage to solder. The last time I tried soldering this guitar in the cold it was a disaster.
I just put the control cavity cover back on to bring the guitar inside to clean and restring it before finishing the installation tomorrow afternoon.