Hey Bushie,
I am not the guy to ask about porting, as I normally just scrape away all the carbon in the exhaust port and pretty much clean the inlet port.

I have read and since forgotten about chamfering the ports on the barrel side after your work, so that the rings wont catch. Cant give you any fine details there.

I have honed quite a few 2 stroke bores now and am due for a new set of stones.
I use the 100mm 3 stone honer from super cheap as it clears the transfer ports.
I set the spring pressure as light as possible and using my drill in forward and reverse try for a 30 deg cross hatching.

From what I can see you bore isn't scored and looks good.

Just read about your atom ignition module, if your bolt was rusty, this could have been an earthing issue, once you clean it all up, the end result your after is a series of blue sparks across the plug gap when you turn it over.

I have the metal ignition modules on mine.
Cheers

Happy is he who penetrates the mystery of things.