Thanks for all the comments guys - having played with some expensive ECU's before I really enjoy the electrical side of car building. As Ash says the beauty of the system is the ease of adjustment. I'm also going to knock one of these up -
http://autospeed.com/cms/article.html?&A=0353and at some point will sort out some Lambda measurement gear.
Ash - pics of your hard rev limiter installation would be very useful.
Cheers
Dave