I use the CK auto strippers a fair bit, but agree that for back-boxes they dont really get right into the box far enough due to having to be used "side -on". I "knife" the rest...
One thing I have noticed is that the red handles can slip off the metal bits, which is very annoying, so need to glue them on if yours are slipping. Also, if you have used lube to pull the cable then they simply slip unless you tighten the gripper thingy...
I'm adding this extra wisdom here, even though it's not exactly relevant, but if you are fitting shrink wrap to identify cables, show SL etc. I use 2 methods:
1. A Dremel gas -powered torch that has a hot air nozzle, so no actual flame...I love it because you don't need any electricity, and
2. A Chinese heat gun that resembles a small hair dryer, and works very well too.
The advantage of method 2 is that if you have a power supply (my car sits outside my garage which has power to it) then if your car doors are stuck with frost and ice, you can open the garage door, switch on the heat-gun which you have placed strategically close to the door, and run it round your door seals and also along the window seals, so your doors open fine and so do your electric windows...no more disconnected window-lifters and the cost involved in fixing that! Yes...I've been there!
I have to say I love my Dremel gas torch...get one for Christmas if you don't already have one!
Tomorrow, I'm going for an interview as a product placement advertiser for JML...
not really! But for applying heat shrink in confined places, the Dremel is ace!
It solders too...and other stuff, but that's more of interest to ..."other trades"!