I enjoy modifying most things. If I go too far and have a failure there is a shop full of tools and equipment for repairs. It has always been that way.
I recall welding up hotter camshafts for lawn mower engines when I was a kid; sometimes good results sometimes bad.
I tore down and reassembled my first car engine in the 6th grade, it didn't run (no carb), but I learned a lot.
