Compared to my original directional one I have had fitted for ages and a good many mile, the new ambidextrous version needed more rotation to get the led to illuminate despite accurate positioning of the rotor. However, I quickly refitted the original back on to what what looked like the original marks and surprisingly it also was slightly off to where it was originally, the careful positioning of the rotor seems to be the key.
The one version that I know of where it started but would not rev well, the air gap was just over 3mm. This kit is now running nicely on another Commando.
Why do some tighten the pillar post bolts to within an inch of their lives and crush the backplate, spotted today on one of the kits tested - I just nip mine up and not had them loosen.
The testing I did today gives a failure rate of 1 for all the kits I have sold (numerous) and half a dozen I have fitted (the one kit was fitted by its owner to a long standing bike that would hardly fire using a roller starter - it burnt out the stator suggesting problems elsewhere) which proves they must be fitted correctly, which for a MK3 is a doddle, but as I found out today accuracy is key, those using the scale in the primary cover and rotor mark may well end up having to slightly re-position the rotor if they are dead set on getting stator set mid slot for looks.
I use two 6v PVL coils, 14 Amp hour battery and Tri Spark rectifier, wire wound moulded HT leads, NGK Iridium plugs, so nothing different to what most other owners use. The loom is original, but I keep a check on it and the other thing to remember is that it is no point having the best wiring to the services and loads if the earth return path is neglected - always worth checking and cleaning earth connectors and ground positions.