Had several chats with em very helpful best service i have had in years.
Just though i would tell every one

TTS?.... Tall Turnip sniffers?

I would second TTS, they know how to set up becs, not cheap but always had good results and service.

Towcester Tuning Service!

TTS are top banana in my book.
Took my LocoPan to them.
Really nice guys, my clutch was slipping so they couldn't do a full power run so charged me less and let me borrow their innovate for a while to see if the shimmed needles worked well.
And they even gave me some free advice about supercharging BECs, lowering compression etc etc....

I bought my Rotrex from them and it was a bigger model than I would have picked from calculations. Good advice as its been working very well on my Striker since I've fitted it.