You normally need to employ 4 Thai staff to get 1 year extension of stay.....unless Im mistaken. Thats why you get the 1yr multi entry non-B, same as I have.
However if you do manage to get one, please let me know.
7 days is no use to me, I actually need about 20 days, then Im heading back to Europe for Christmas, so was hoping a 30 day extention could be had, like with Tourist visas.