Many more than that - each specific combination of equipment will have a dedicated revision. For example:
90mm, 16x16, 0705 racerstar
90mm, 16x16, 0705 sunnysky
90mm, INDY, 0705 racerstar
90mm, INDY, 0705 sunnysky
90mm, E011, 0705 racerstar
90mm, E011, 0705 sunnysky
One thing I just thought of is what is the length of the included mount hardware between racerstar and sunnysky 07 series. Can anyone answer?
On to the 11xx series we have two motor bolt patterns as well. So in total there will be twelve 90mm frame variations.