The Chief Test Pilot for Titan is running exactly that, the LC9 5.3. I have flown that plane. Gobs of power! The PSRU is fine, with a very good history. I would contact Titan to get more info. Ask for Brandon or Bill or John.I ask you: what is your take on that PSRU? Are you confident with it? How much does it weigh? Seems to be a nice unit for using with a 5.3 LC9 bolted to an RV10.