i use a 1 to 2.5oz inline square lead with the insert removed and then put a tail rubber over the swivel and then lead pulled onto the tail rubber, gives enough resistance to create the bolt effect but then slides up the lins and off the rig tubing, critically with no insert even if i cracked off and there was a knot or line tangle there is a 5mm bore through the lead that would allow it to pull off (hopefully). Thats always been my preferred way of fishing. personally if naked chop and helicopter rigs are allowed then so be it, i wont use them but if the rig is allowed then its allowed, same as elasticated feeders, never used them but if allowed then allowed!