Going by the spirit of the rules, the idea is to prevent people from having more time than others to test and fix problems. If you
do not use any of the modifications/restore them to their original condition, I would say that you're okay.
That being said, I'm not a judge and people have different opinions on rule reading. If you have a feeling they'll go by the letter of the law, then you're in trouble; better start building a new control box.
