Desk 4 was intended as a piano stand.

After much debate on how to adapt it to the keyboard springs, it was decided to keep desk intact & create adapter plates.  The only structurally sound way to mount adapter plates was on the inside.

Then a scrap piece of wood would mount the confusers.

This area would be vastly more efficient with a single x86 confuser.  Those single board confusers are as expensive as a commodore 64 was in 1984, $200.  It's still a lot of money.

The cables aren't long enough for it to extend to full height.

While it extends from a standing to a sitting position, there's not enough room for an animal's legs under it.  The structure between the motors would have to be taken out or the keyboard would have to move to the front holes, in which case there wouldn't be enough room for an animal to sit in front of it.  If it was in the front holes, there would be enough room to mount the LCD panels on the desk.  There would be enough room for a real 4k panel.

Another solution is to chop off the rear of the angle rods, push the legs right up against the bed, move the keyboard to the front holes of the remaneing angle rods.  That would yield a completely unobstructed space for the animal's legs.  Chopping off the angle rods would remove any chance of mounting the LCD panels on the desk.

There might be a way to angle it so the right leg is right against the bed, the right angle rod overlaps the bed, & the left angle rod is right against the bed without being chopped off.  The animal would have more room by sitting diagonally.

The bed is very far from the window to use that space for storage. There's just not enough space to have an ideal solution.  A twin bed against the window or a bunk bed over the piano might be another way.

It does achieve fully configurable height.  This application would benefit the most from presets.  It gets partway to achieving a sitting position.  It makes lions miss the original wooden stand.  That worked on the 1st try, even though it didn't support standing.