I bought these (Hyperlite 2405.5 1722 KV High Voltage) motors because I wanted to build (another) 5 inch Armattan in the flavor of my Chameleon Ti 7", and they were CHEAP for top tier motors. If you don't know about the PyroDrone motors, check them out. Their bearings are unparalleled. I had the F35A's left over from quite a while back, and because they are 6S capable and 32 bit I figured they were a perfect match (BTW - know that T-Motor single ESC power and ground leads might be backwards from the PDB you are using, and if so you will likely have to build with them upside down... I did, it is not a big deal.). They are, but I had some difficulty understanding that "High Voltage" means "these motors can run on a minimum of 5S, but 6S is what they want, and what you will use when you feel how anemic 5S is". In the end; this quad carves turns like my Diatone GT2018 on F60 Pro II's does (with AUTHORITY). The quad is a little heavy, but this combination satisfies most freestyle pilots' need for power to weight ratio. Flights are about 4.5 minutes, which is fine for such a powerful experience. On Betaflight 3.5.7 stock PIDS and the trusty old HQ5x4.5x3's this air-tank flies as locked in out of the box as I'd ever expect out of a quad. This is my fourth Armattan frame, and I think they are easily worth their premium price point.

Edit: I'm running the HQ 5x4.8x3 V1S now and they are really amazing props. They've truly smoothed out a few of my big guns since I found them.

Edit 2: Now I run with APC tri-blades (build list updated). These are the best propellers I have flown for 5" freestyle (not drag). The 3.7 and 4" pitches accurately match the light prop/motor combo that Hyperlites prefer, and so they rip even harder than the HQ 4.3 and 4.8's IMO.