For a good R-21ec Helmsman's floorboard to stretch your feet out on, a small piece of sturdy 0.60 sheetmetal (size: 14-1/2"L X 12"W) will work. Just lay it over the foot of the bedcovers. A 90 degree 2-3/16th"H radius bend (turned facing down), will tuck-into the space between the foot of the mattress and the wooden footboard. An oval (5"L X 1"W) cutout inside the bend will keep it held down in place. When removed, the oval cutout can also be used as a carrying handle. While keeping the bedcover cleaner, this Floorboard feels solid under legs and feet from the Helmsman's chair.
Also, the best Tugnuts idea for covering the wooden bed-footboard in the same area was: to get a yard of 1" Dia. clear tubing available at any Home Center. 3' should be enough for Starboard and Port Side footboards to match. Slice the tube Straight down through one side only, end to end. Then slip it over the top of the footboard and cut it to length. Clear tubing looks like a bar top finish, good to see the wood through.
Any R-21ec DIY can make and install one of these Floorboards without any tools involved. (except for duct tape and a cutter). It's the cheapest, fastest upgrade worth trying for a simple Floorboard, even though it's not actually on the floor.
We bought this new aircraft fuselage sheetmetal floorboard, precut, with the 90 deg bend, safe rounded corners, and all deburred edges. Harbor Freight sells this Mixing Board for $8 bucks. We tried one mixing board for about a dozen hrs and decided it was a little narrow. So I got another one and duct taped 'em both together. It's a good 2' wide now. The taped pair fold up for quick emptying of any dirt. This Helmsman's floorboard is non-corrosive aluminum cladding. We might cover it up with something like a laminate later on, but it's fine for now.
-Bill And Jane