If you Dremel the slot longer, it will probably end up loosening and the mudguard slipping down tot the wheel sporadically - can you take the L bracket out and rotate it? As in, use the side that’s flush with the guard to be the bit that bolts to the bridge?
If you Dremel the slot longer, it will probably end up loosening and the mudguard slipping down tot the wheel sporadically - can you take the L bracket out and rotate it? As in, use the side that’s flush with the guard to be the bit that bolts to the bridge?