Hi. This is a great site. I am an FPV experimenter, and am glad to see all the hacking of available equipment going on. I am also on FPVLAB and RCGROUPS. Some of my recent projects have been similar to the backpack, trying to use cheap and simple equipment. I used the receiver and transmitter modules from SDSHOBBY to build my own version. One thing I did was use a 3S lipo with a tap at 2S and a 3.3v regulator for the transmitter. I need the 12 v for the camera. I would be interested in people's experience with the SBECs, which are much more efficient and used in the commercial transmitters that run directly off 3s.
Other recent hacks I have done are:
1. An audio RSSI meter for the 5.8 receiver ground station. The tone increases with increasing RSSI signal. I use this to help point my goggle mounted helical antenna.
2. Installing Infrared cut filters for cheap cameras that lack IR filtering. Greatly improves the daylight color of these cameras. I bought 100 of the 650 nm filters recently, and am selling them nearly at cost to FPV people. $3 each or 4 for $10 postpaid in USA.
I hope to take part in your forums soon.