If you mounth the hallsensor 40 degrease BTDC.
The engine will start with ~ 15 degrease BTDC (easy start) and on 1800 rpm it wil jump back to ~35 degrease.
This is normal for allmost all engines, but you can changed it in the Exel-sheet.
After the 1800 rpm, you can make a advange curve by your self with the Exel-sheet.

The bonine I use is from a 50cc pocket/mini bike

See [link=http://home.online.no/~jon-mj/making_the_transformer.htm]this page[/link] how to make a transformer.
The configuration of a ferritring or E-core transformer are the same.