Yeah, that 35g empty airframe means it is probably too heavy for the RFFS100. My Micro Taxi (aka Lightning) was 40g RTF electric free-flight.
I'll try mine free flight first when it arrives just to see how it flies. It may not like the extra weight added for R/C. I think Jason over in the RC microFlight forum used a direct drive GWS motor. This would be a good step up in power and pitch speed from a geared N20 motor without adding much weight.
My slightly bigger Cannonshot (aka Kavanshot) flies great with GWS gear. I recently replaced my DX-A with an S1 for more RPMs with 7x6 prop. A superb indoor or low wind outdoor flyer.
We really need a Pixel ARF.