Hello Phil,
I got your message but thought I'd put up the info in-case others may be interested.
Firstly it's the best value mod I've done, it does everything that I required. I use MAP and there are no pit falls just get the trigger wheel mounted about 14mm of the face of the pulley so the VR sensor has room to miss the pulley and get it as true as possible ( within about .5 of a mm) and start with the default map and modify to suit. The only technical drama I had was finding the comm port on the computer to allow communication but if your half computer literate this shouldn't be an issue.
I got my EDIS stuff on E bay from a company called Atomic jaw breaker in the US (praise the Aussie dollar), just over $100 complete tested and delivered,
http://www.ebay.com.au/itm/EDIS-4-Ignition-Module-Ford-Kit-36-1-VR-Coil-Megasquirt-Magajolt-/110798876737?pt=Motors_Car_Truck_Parts_Accessories&hash=item19cc20b041#ht_855wt_1185
For the Megajolt go to
http://www.autosportlabs.com/ heaps of info and a good forum for any questions.
My advise, do it!
Ian
