Ha ha Graham. A colortune on a midget?
I did find a very nicely concise description of tuning on a midget website..(MG). http://www.mgcarclubdc.com/techtips/sucarbs.html
I'm still failing to get the acceleration up when I adjust the mixture. It runs well until 4500 rpm and it stutters... Perhaps a distributor overhaul and carb tune up is due this winter for the Dutchess.

'67 +4 tourer - broken white - RHD