Is a computer-filled TM7 form printed in black ink acceptable for a Non-O visa extension in Thailand?

Tod Daniels, a quick question please, last year, when renewing my non-O extension, over 50, at Cheang Wattana I used the computer 'fillable' TM 7 posted on this site. So when printed all in black print and all accepted without question. I read this morning that forms should be completed in blue ink and not black to avoid form looking like a duplicate.

Was I lucky last year or is the computer filled, black printed form completely acceptable?