I would just like to clairify a few things regarding power in glow version. The stock head uses a regular plug and this is a great power robber as the threads of the plug are included in the combustion all the way up to the copper gasket. This is one major difference to e.g. Norvel .074 wich uses a glow wire integrated in the head. Using a turbo plug eliminates this and gives an extra 1500 rpms. This would not be an issue with a well made diesel head, the power should come right up.

The mods to the throttle barrel were minor. The bore on mine was conical, which made the engine run to lean on the low end. I simply enlarged it slightly to an even diameter of 3.5mm which is still small enough to maintain a good idle.
The exaust was also enlarge a little and these two changes gave around 1000 rpms as compared to stock.

Together with matching the channels the power is then on pair with the Norvel and this is promising also for a diesel version.
I think the transfer channels can be left alone and the breathing could be improved on depending on the application, so just go for it...