I'll look forward to those calls then Chris. ;-)
I helped a mate install a ground source heat pump (he is a plumber and was thinking of making such installations his (side) thing) but he imported the actual pump directly from China, the instructions for the controller were nearly non-existent and it never really worked. I never really gotround to going though it all with him to see if we could actually get it running. Luckily, he also installed a new CH boiler ... ;-)
Cheers, T i m