Sorry for taking so long to reply, but basically the short answer is no.
I could rebind the kick to a number (like 3), but the major downside to doing that is controller players cannot do the input, whereas they can with the horn button. It's also not possible to bind it to any other key outside of ones the game already uses for an action. Sorry!
As for the debug mode thing, that would be an incompatibility between Vineskills and the NTU Weaponmods mod. I can't really do anything about somebody else using B for a debug tool. In that case you'd basically just have to do the "true input" instead of B.