Fun times. So, what changes did you require for a LP valve on the illusion? In the factory we were able to convert the Sentinel to LP by reducing the valve pin diameter at the seat end. I believe the first version of that conversion was done on a benchtop grinder and cleaned up with a dull file, but it worked great. Our Shop Tech played with it a bit, and got a Sentinel firing under 180psi. I don't recall if he had to make a custom valve for that set-up, though.
EX-Action Markers employee. Stop asking me for crap!