Here is what I accomplished before taking on a quick (and almost finished) contract build in early January. Some of the pictures are very slightly out of sequence. Mea culpa: hadn't planned on doing the thread so soon!
Lozenge fabric backing fitted, including nail-heads and drilled out mounting holes for the seat supports, small instrument cluster using kit decals and AeroScale bezels, floorboard wood-grained with a home-made decal, two seat-mount sections made from aftermarket rod (never could get the seam lines off very thin kit parts properly!), the seat and two bulkheads.
The RB Productions seat-belt set assembled with the metal fittings painted Gunze Sangyo RLM 02. Very good seat-belts and easily assembled.
Bulkheads and fabric backing assembled. Wood-grain effect on the interior surfaces using the tried and true oil paint method.
Where we stand right now.The control column is dry-fitted to see just how it would sit, the instrument wires will be bent, spindled, twisted and beaten into place along the right surface of the fuselage interior up to the nearest bulkhead groove to them. BTW, the bulkhead grooves were taped over to ensure that no paint got into them and thereby make it a problem to fit the bulkheads as they should. The engine compartment is painted RLM 02 as some protection for the wood against oil or other engine liquid spillage.
I'm almost finished my current contract build, so I should be back on this thread inside a week or ten days. Until then, thanks for visiting!