I would also recommend a strong pair of glasses, one thing also..Not sure if the wiring on the SEF's have changed over the years but on Davespen chart, the wiring is wrong for the 10x12, Changed out a Older SEF coil for CanSlaw, did not realize the problem until I took it all apart and installed on a sovereign....will have to lookup the two wires that are wrong. If you do connect it wrong, When PPing with the center of the coil, you will get a silent spot, and no chrip, get back to you on the wiring.........