Ive been considering megasquirt aswell for my na engine but thing i have no mapping experience at all. I know whats involved and im very good with computers/programs etc as im a programmer but i wouldnt wanna blow my expensive engine up. So not sure whether its worth it.

Is it gonna be really easy for me to kill my engine if i fuck it up?
Also i take it your best off hooking up a wind band lambda to properly map it .