Haven't done an LP carve top, but have installed the push-push pots from Warmoth with out issues/modification on:
1.) Rear routed Strat
2.) Tele rear routed with LP control routes
3.) Carved top VIP
4.) Flat top VW
You MIGHT see an issue with SOME knobs. If you are using metal Tele type knobs with a set screw they may not work if you try to mount the knob all the way down on the shaft, but if you pull it up from that position just slightly before you tighten the set screw it will work.
I wish I had known this two days ago - I could have canceled this order. I think I'd rather get the long push pull pots. I think I'd rather be able to tell if the pot is up or down. That's what I'm used to and it makes more sense to me.
You can very easily tell what position the push-push pots are in; "normal" - the knobs will be at a normal level to the plane of the body "switched" - the knobs pop up about a 1/4" or so. While you DO push it down to toggle it, the knob shaft pops up in response. Think dbw confused with the way he explained it.