I have been wanting to build a 1s brushless tiny whoop for awhile. I decided to try the Rakonheli Delrin and Carbon 66mm frame, it looked like good quality. One of the canopy posts blockes the USB port to the flight controller, which is a pain, but can be worked around. I tried using a BETAFPV Micro DSMX Receiver at first but could not get it to work with the flight controller. Never figured out why, but a Spektrum DSMX Quad Race Receiver worked without a hitch. Go figure! I had one of the brushless motors fail on the third flight. The quad dropped right out the sky like I lost radio signal and I found the motor dead. Turns out the crash broke a motor connection at the ESC. Still not sure why it dropped out of the sky. It was 10 feet from me and I was flying line of sight. I am getting 3:30 to 4:00 minutes of flight time on BETAFPV HV 1s 260mah batteries. Current weight without battery is 27 grams. Kinda heavy compared to a regular brushed Tiny Whoop. I really was not as worried about weight as just trying to get the thing built and working. So far, after a dozen flights, I am happy with the build. Still need to tune and get the feel of the drone. First outside FPV flight below.