Was searching in the other threads but couldn't find an answer to this. One of the foil fencers in my club wears hub caps. Her answer to soft padded chest protector requirement was to buy one of these retrofit kits, attach an elastic strap to it and wear it under her plastron outside of her shirt. My gut feeling says this wouldn't be allowed since the foam isn't attached to the hub caps but It would cover the area facing the fencer where the hubcaps are. What do you guys think?