i unerstand that the CTS is a cheap cool alternative to others, but its just that. i hate to say it, but at this point, nothing can touch the dd, not even close.
Especially now that i have a harness for reading low pressure boost
The DD is an awesome tool for sure
And FWIW you wouldnt want to put another sensor in for rail pressure thats 24,000 psi of pressure...
You could possibly tap into the return wire for the factory sensor and rob the signal and translate it into a usuable number, but i wouldnt want to hack into the harness like that.
Cant you watch FRP on the DD under generic OBDII? Sounds to me like edge doesnt really want or care to do it.