For the special I bought Pazon twin plug Smartfire in an extra hot version, double wattage his regular twin plug Smartfire.
Havent assembled that yet, but I am praying for easy kickstarting as it is 1360ccs andc10.5 to one, squish heads.
The bike I have ridden the most has converted Norton twin point twin coil ignition. An English company called Dolphin Electrics made up a number of these conversion for Vincents back in the seventies. I like it a lot, the bike is ridiculously easy to start and makes very good power. Also, I can easily carry and install roadside, if necessary, a complete ignition system when out on tour. Just spare points, a couple of coils, the little ballast resistor and the condensors. Only problem I have ever had with it was when I installed some aftermarket Daichi replacement points. The heels are too soft and wear out in about 500 miles. With original Lucas points you are good for an easy 20,000 miles between changes, more if you dont mind dressing the points. I dont imagine you can buy this system anymore. It is tough enough to find the proper NOS Lucas points.
I have quite a few sets on the shelf for future use.
My other Rapide has D distributor igntion. It is not as easy to start as the Oz bike, but that maybe related to the Mikuni carbs it has vs Amals on the Oz bike.
Another system which is very popular in this area is Harley Screaming Eagle Electronic ignition mounted in a custom housing by John Mcdougall, a name you will hear a lot in Vincent World. Johns system, the BTH electronic mag and the Pazon are all in the 1,000 to $1400 range
Glen