Without seeing it personally, I would say you’re going to have to remove it (the exchanger) to weld it up. Welding it won't be a problem, just flush it out and make sure it's dry and clean. You should double check but I believe you’re going to need about 10 or 20 rivets and about a days worth of time to remove and reinstall. I would get the OEM or at least a few to ensure the grip range is correct. Everything on the sled ties everything else together, also too long of a rivet may rub on something, it's pretty tight in there. Either get the rivets from a Fastenal or similar or just order from dealer. They are different than the standard type and to me better quality and more durable.