Andy, you say about using a laptop to map it etc..

Wouldn't you rather someone with experiance who knows what they are doing get the most out of your engine, without causing any damage and leaving it safe within limits.

The cost for this from a TOP Tuner is around £100 why would you ever need a laptop... to look pretty on your dash?

If you wanted a laptop its still easy to do with weber as it is now!

However:-
In the next few months alot of changes will be happening with the weber ECU's allowing visual changes and an interface with a laptop.

If you are already running on a Weber system i.e the setup which i use or similar you will be able to upgrade to use the laptop and adjust what you like to your content or untill you blow your lump

Regards