Electronic ignition.

[wild_willy]

I have fitted the Accuspark hall effect sensor as well. Engine idles and runs smoother. I like that the Accuspark comes with the bakelite (plastic) base which fits with the 2 standard screws to the DK4 distributor allowing me to carry the original base complete with points and condenser as an easy fix should the electronic bits fail. Like Barry, I also have marked TDC on the cam pulley and use a dial back timing light to set total timing.