Update: I found a shop in Nang Rong who were able to carry out the required repairs. It is located at the crossroads where the 348 crosses highway 24.
Mods, can you close this topic please?
Thanks
There isn't any difference. I should have said that tax liabilities are not dependent on the type of extension you have. I seem to have created a "rabbit hole" with a poor choice of words previously. I won't be responding further.