1. Insert your stack bolts into main plate prior to frame assembly
2. Assemble keys in Main & Bottom plates first before inserting arms last
3. If keys are too tight to fit in holes, use some Wet & Dry sandpaper (while wet) to sand back the keys just enough to get a snug fit. (This occurs because the thickness of carbon plate can vary +/-0.20mm). If for any reason the arms are a little loose between the keys, try adding a slither of electrical tape.
4. If you face the arrow of the middle/bottom plate towards to the back of your quad, you will gain a little more camera to stack clearance. Aslong as your esc will fit this way (Foxeer Reaper 45a and 60a slim wont)
TUNING RECOMMENDATION
I recommend using the below tune which is basically Karate PIDS with some slightly less aggressive filters. This is a safe tune for the FORTY5 unless you’re someone who likes to blackbox your own tune.
The below tune needs to be applied to BETAFLIGHT DEFAULTS. If you have already loaded Karate/other settings, you will need to revert to defaults before loading this tune. Make sure to add your RC link preset too.
This tune was using an MPU6000 using 8k/8k Gyro/Pidloop