A few of my notes when installing mine:
Make the sliding step as long as practical but no more than needed.
Mine is mounted on the aft side of the lower instrument panel bulkhead. You can use two metal tubes with the outer tube attached to the bulkhead. I think there is also a lot to be said for two tubes.
Instead I used an angle steel bar for the sliding step, cut down to 1 inch x 1/4 inch by about 13 in. I started to use a full length fixed metal brace/support above and below the steel slider but ended up having a 6 inch hard point (wood and glass) against the left sidewall and floor bolted to the inst panel bulkhead (with liberal flox and BID glass attachment to spread the stress further out on the bulkhead and floor). This supports the weight. For the middle brace (bracing down) there is a 6 inch aluminum angle brace bolted to the middle of the lower instrument panel bulkhead.
The sliding step is long enough to allow for a 5 inch step when extended, with the right end extending a little past where it meets against the middle 6 inch alum top brace.
It works. Get started, the details will come to you.
Bet you are already finished.
