Yeah I know......stupid, but it happened. (Wrong tool but it's all I had in the length required to get to the bolt). I managed to break the ball off of the end of the Allen key in the bottom bolt securing the mounting bracket of the OEM coil mounting bracket/seat post. How the hell do I now get the ball out, but also how do I get that bolt out, it is so tight I can not think how to get it out. The access to the screw is limited as it is in the centre of the engine behind the rear cyclinder, just below the oil tank. It a 2016 Fatboy Lo, btw. Any and all Ray's of wisdom would be most appreciated. Than you. 

Thanks Hilly, I'll try those suggestions, appreciate you taking the time to respond.

Thanks Hilly, I'll try those suggestions, appreciate you taking the time to respond.

Hilly, I got it out! The broken piece of Allen key! Thanks mate! I had to use a long flat screw drive to reach it, but a few gentle taps and I was able to fish it out with a magnet, so back to square one.  I think I'll have to make a socket Allen bit, by cutting the Allen key and placing it in a 5/16" socket, because I don't have a Allen socket set and can't find one where I am based at the moment. Thanks mate.

Thanks guys, all sorted. Cut the Allen key down to a stubby, shoved it in to a socket and bob's your Aunty, out it came. Amazing what you can do when you use the right tool for the job! God on yous. Muzza

Wild1 501 Chubbys installed, was a bitch getting the cables through!! The grease helped but it was tough. Freight Train Nacelle not yet delivered! Also installed Arlen Ness Deep Cut grips and the DK Custom coil relocation kit with the Red plug wires and the Arlen Ness Deep Cut coil cover. I relocated the OEM cow bell horn to the front of the bike where you normally bolt on the engine guards. Ride looks fuckin Schweet. Still waiting for black HD pop up gas cap and gas gauge, as well as the black HD brake and clutch levers, hopefully get those this coming week, so I can finish my summer mods. Then I can put the tank on and start her up! Woohoo can't wait. Problem is I can't ride until later September when it will hopefully cool down to something bearable , riding in 49 - 51 Deg C is not fun.