RE: FIRE 90L
The APC rule on their sport props is they are safe up to 190,000/diameter in inches. So, 10" prop - 19k for example. They don't instantly fly apart when you exceed that by a small amount, but be aware of it.
In any case, don't go trimming anything or messing with the setup until you talk to Dub directly or wait until Bob can get on line here. Did you not get any direction on ground rpm, prop choices, that sort of thing..?
MJD