RC, I'm slow here....just now noticed your question. I would wait and try the belt for fit...if it were an ordinary H constance belt, then, yes, you could take a 90 and make it work...just punch more holes. In the Constance belt, I buy the 90 and get holes punched in it to make it smaller
yes, I know that's strange
.....so I end up with approx an 85 on a 90 size belt. You can get by with this on the Constance, but, with the CDC belt, you have to get it much closer to true size. You can't play around punching any more holes.