Mike.....I hate to keep this subject going....but I"ve hit a snag......the 
instructions don't tell you which leads to connect your coil 
to...?..........they are very vague.......it says:

I made sure the
capacitor was discharged, and cut the wire leading to one end of
the flash tube, leaving enough length on each end to attach the 4
feet of 16 gauge speaker wire that goes to the coil.  The coil is
MCM part number 50-940.  It is important to cut a wire leading to
an end, not the middle of the flash tube.

Which ones go to the coil?....which is negative?.....which is negative on the 
coil?.....sorry......but thanks....Robb