Hello l currently have a non immigrant B which runs out in Febuary ...if l have to go to tourist visa what is the procedure and what do l have to do ?

You visit a Royal Thai Consulate in another country and apply for a tourist visa. You will need your passport, photos, fee of about 1,000 baht in local currency and an overnight stay. You may also have to obtain a visa for the other country.

We're in the same situation - have a non imm B that soon expires. We are planning to re enter as tourists with a visa on arrival as we only need a short time to sort out leaving LOS for good now that we've sold up. Does anyone think this will be a problem ie. having had consequetive Non Bs for 5 years & then wanting to come in as a tourist?

You should not have any problem to become a temporary Tourist.

You can do 3x30day runs without problem .

Have a look at MFA officoal webside , plenty of info

http://www.mfa.go.th/web/12.php for general info and to check situation regarding yr status

pls have a look at a subfolder http://www.mfa.go.th/web/2482.php?id=2490