Hi David

Firstly, I don't see using velcro to hold the link in place being an issue, however if a tech checker hypothetically did take issue with it then you would be allowed to simply remove the velcro & carry on. One good thing about tech checkers is even if something does fail they will allow you to change it on the day so you still get to fight, plus there will be plenty of other roboteers around to help & give advice.

To be honest though, as long as your fuse is rated lower than the max current discharge for each battery setup I'm sure you'll be fine. It looks like a good bot, I honestly wouldn't have believed it was a 1st attempt.