Unfortunately in today's world if you want to sell your product overseas you are going to have to deal with emails. If you can't handle this very simply sell the product local only with the high possibility of going out of business.
In saying this I am very happy with my Kolibri so far and hope to get good service when needed. If not I will simply sell the turbine and look forward to another manufacturer.
In saying this Martin so far has given me good service. I have sent him one email and he replied within 24hr.
I think this was a very reasonable time frame so definably no complaints from me. For overseas customers I think you have to be ready for a 6-8 week wait. Anything over this with out a honest excuse is just unacceptable.
Ivan