After looking at other panels I decided to mount my flap and elevator trim indicator panels one above the other, on the left hand side just above the master battery switch. I also drilled a hole on the copilot side for the cab in heat push/pull knob, which is exactly opposite of where the hand brake knob is. Drilled and fitted the cable lock nut onto the hot/cold vent elbow. Trying to have a nicely balanced panel. Also tidied up some of the wiring and cleaned swarf and filings from the cockpit.