Devious Rhesus

Howdy all! New Mooney owner, and new to complex aircraft, so a few questions! I'm flying a 1964 M20C The POH and various online checklists / forums have listed different RPM's for the run up checks. Since the POH was published 50 years ago, I guess the wisdom behind it can improve... What RPM should I be doing my checks at? What flap position is common for take off and landing? Most of what I have seen lists 15 degrees for all takeoff conditions, and not much info for landing. What RPM should I be looking for at full-power on take off, mixture rich full prop, at my 50' ASL airport? The instructor I am training with has me bring the power to "25 squared" at 500' AGL for climb, and has be always square up the numbers for cruise settings. Is this appropriate? Thanks so much for your help!

I know there have to be certain fire standards that have to be met when re-carpeting or doing the seats, but what say you all about making your own side panels? What I'd really like to do is toss out the plastic, install some stiffeners on aluminum panels cut to fit, and cover those with carpet or leatherette.