Can I exit Thailand and return for another 90-day stamp on my Multiple Entry Non-B Visa before January 14, 2019?

Question regarding WORK PERMIT RENEWAL & NON B VISA. (pls no "opinions", just solid info pertaining to my questions below)

- Passport - Spain

- Last Non B issued - Penang - Jan 15/18 until Jan 14/19.

- Last entry Stamp into Thailand - Nov 16/18 until Feb 13/19.

- Work Permit - Valid until Oct 1/19.

- Non B details - Multiple entry (Company owner)

Questions;

1) With the Multiple Entry Non B Visa, can we exit Thailand and RETURN BEFORE Jan 14/19 and receive another 90 days stamp? (on the same Non B Visa)

2) When applying for a new NON B Visa in penang does the WORK PERMIT need to be valid for a certain amount of time? (I've heard that it has to have 8 months left on the validity date)

3) With regards to the information above - should we do;

a) and in and out exit now for another 90 days on the same Non B Visa? or

b) Apply NOW for a new NON B Visa, because the work permit is only Valid until Oct 1st/2019. (if the 8 month rule is a rule, I dont want to get another 90 days and have to make the work permit again)

I hope this is clear and makes sense! Thank you in advance!

Tod Daniels Lloyd Turner Robert Lagas