Dude you come to the right place with that question. I made a hip mount and a chest mount for my 1270 3 years ago and I swing it all day even with the 10.5 coil. Had the same coil problem on mine and I over came that by making it from an extra cable I had for my fisher 555-D detector that I also made a hip/chest mount. 2 ways to fix it #1 by enough wire about 4', you want at least 7' cable, cut the connector off, solder one end to the cut off wires (don't forget to slide on a piece of heat shrink so you can cover the wire and insolate each wire with tape so not to short each other out and then splice it in at the connector .Check to make sure your coil wire matches the connector wire color. Example red wire on each end , and the whiteis connected to both reds. If you happen to get the same 5 wire color pattern then that a no brainer. the connectors are on line but not in the right way, the male end needs the male threads and the female needs the female threads, I cut my 555-D cable and unclipped the connector covers and switched and then slpiced the wires back together. works great for me.If you want pics of what I made email me.
pb23@optonline.net. doing it yourself is the cheapest way. I have a few lines on the extension cable. if you handy its easy anymore info you need shout out i'M here.( Don't take off the handle!!)