The quinquennalia of Carausius

It is surprising how taking a fresh look at a worn coin will give you a different reading and that has happened to me with this coin:

Carausius 287-93
Antoninianus
Obv"IMP CARAVSIVS P AV"
Radiate, draped and cuirassed bust right
Rev "[VO]TA QVI C[AE]"
Roma seated on shield left
-/-//[MX?]
RIC - (cf 1095)

I thought it had read ROMA CONS, however, what I thought was ON at the top of the coin is actually QVI and is actually a coin from his quinquennalia, the vows discharged after five years reign and looking forward another 5 years to his decennalia or 10th anniversary (MX below the seated Roma, not really visible on this coin being short for "MVLTIS 10").

I was familiar with the two or three known similar examples and even commented on the similarity of my specimen without making the final leap into attributing as such. Re-examination of the reverse lettering has now confirmed it for me, after being mis-identified for eight years or so.