Is it possible to make sure that experience is not added when using a chainsaw and a jackhammer?

Honestly I've never actually used either of those lol. I'll see if there's a way to do that and add an option to disable xp for that.

Does it give you the same xp as it does when using an axe or rock?

yes, it gives the same experience, so players level up very quickly

Ah yeah I can see that being a problem. Will add this to my notes for next update