Trilliwilli mentioned LUA in passing. Been reading up on it. It's a programming language some TX can run. Just a day ago I was dreading having to write my own app to do some simple math. As it turns out Dave McQueeney has already written a freeform algebraic LUA app called V-sensXF which has a walkthrough
here. Exactly what I need to move the decimal and assign units. Could also be used to integrate a 0.5-4.5V output sensor and convert to psi with no external hardware aside from the jeti device to read the voltage.