I usually  never have much trouble with belts twisting, but in tough conditions it can happen. Mainly have had it happen when i get a clump of hay stuck on one side of the pickup i have rolled an outside belt. I have never completely ruined a gator splice. The pins will break, and usually when i replace the pins there is a couple that are broke but you can drive them out with the new pin. Have seen a splice with like the edge of the splice bent, but you can usually straighten it and get a pin in.