Thanks for the idea :-)
Reading that mod, it sounds like my "Shift-H" hotkey is pretty equivalent to its' "H" hotkey.
Is the idea that you're hoping to use one hotkey and have it use this mod if the cursor is over a belt (or something with wires) and delegate to that mod for pipes?
If so, I might consider it, I'd have to read up on mod compatibility/interaction like that.
(If not... just map one of the hotkeys to a different key and pick the mod you prefer for tracing pipes?)
One question, probably for the other mod, is: what does it do if you press "H" when not hovered over anything? Does it clear the previous trace like mine does?
I need to update this mod for 2.0 anyway, so I might take a look at this. It looks like that one hasn't been updated either.