Check to see if Weber have opened up their Alpha ECU - it used to be that only them and selected dealers had the software to access them for mapping, etc. Fine for main mapping, as you may not want to do that yourself anyway, but it is a right pain if you just want to adjust the cold start / warm-up or something similarly simple - you have ot take it back somewhere, taking half a day off work, and then hope you don't have to pay for the privalidge.
Sorry, but it's one of my pet hates - if I spend £500 on a mappable ECU then I want a system that I can program - not one that is just a revenue generator for the manufacturer.
I took my car to Emerald to map it because a) they have a great reputation and b) they will know my ECU as well as anyone, hopefully better. However, I have had to tweak things since to fine tune the warm-up and also create 2 other maps for cruising and MOT (not emissions, just has a much lower rev limit).
Just my 2p worth....
Phil Waters