This kind of support is truly invaluable and it's great that JQ helped you, just because he can. Maybe you should look at THE car when you are thinking of upgrading....?
I have no experience or dealings with the Kyosho nitro guys but always found those I have met in 1/10 to be helpful enough.
In the nitro scene though then I have found most teams immensely helpful, with particular mention to Xray, Agama and Sam from Hong Nor. Literally nothing was too much trouble for any of those guys. It is something I now factor heavily into my car selection, as a relative novice to the game then to stand any chance of success it's a certainty I will need help at some time or other.
Like with anything in life, customer service is everything. You can sell something to anyone once but if you don't support them then someone else always will and that someone else will get the sale next time around...