DIY keyboard music stand

My Yamaha p45 plastic piano's keyboard has a basic plastic music stand that slots into the top of the keyboard.  Unfortunately, it's only half the height of A4 paper (so sheet music flops over), only two A4 pages wide (portrait orientation), and I often use sheet music that's three or four pages wide, or want somewhere handy to put the next piece of music.

My simple solution, so far, to dealing with inadequate music stands on piano was to use a thick cardboard folder sitting on the supplied stand and bulldog-clip music sheets to it.  Though it liked to skid off the music rest onto the piano, so some adhesive velcro was attached.

Out on a gig it wouldn't be too bad to just put a standalone portable music stand behind the piano, but that takes up too much space at home.  And you end up with a collection of overlapping stands—one for the keyboard, another for the music, another for a light (although a reading light could be attached to a sturdy music stand, I found positioning it so it doesn't reflect off the white keys while you play was next to impossible, and I soon abandoned that idea).  I contemplated several different solutions:

1. Make a larger version of the slot-in stand, and hope that it'll fit into the piano without any problems.  My old Technics SX-K200 portable keyboard had a very lightweight, but sturdy, wireframe music stand, that zig-zagged up and down in a large M shape.
2. Or something that attaches to the bottom of the piano, using the leg mounting holes.
3. Or, make a larger music stand that attaches to the box stand I've just made.

I went with the middle option.  Cut up some metal parts to make brackets, and fitted a shelf to them to use as the music rest.  The local hardware store sold pre-made shelves which was just about the perfect size for the music rest.  They only came in white, which fits in with the usual black & white colours of pianos, and everything being black has proved to be a nuisance when working under subdued lighting.

There's some square-section aluminium tubing going under the piano, and screwed into the mounting holes the piano has for attaching to Yamaha's furniture stand.  Though it could have been attached to the piano stand, instead.  It has some elbow joints to bring things up to just above the keyboard.  More square-section aluminium tubing with a curtain rod going through the middle of them as an axle for the music rest to pivot around.  And a right-angle aluminimum strip is sandwiched between the tubing and a melamine-coated wooden shelf.  Then there's a metal strut with a hinge attached between it and the music rest, and the other end has a foam-padded metal right-angle section to brace against the piano box stand, to hold the music rest at the best angle for reading sheet music on it (to suit my height, and have no reflections from the lighting—even with sheetmusic in plastic sleeves, or reading off a shiny computer tablet screen).

The music rest can be dropped down backwards to get out of the way when a pianist is playing without music, dropped down forwards to be less cumbersome while carrying (and isn't so wide that it lands on top of the few controls the piano has at the left-hand side, though now I realise I should have slightly off-set it to the right, so that it can't shove sideways against the edge of a white key—I think I'll leave my fabric dust-cover on top of the keys when I transport it, as padding).  I could add another hinged short strut behind the prop, so it can be folded back horizontal, to make a work table.  And the square-section tubing can be pulled apart to remove the music rest from the piano.

For comparison's sake, I've sat the original music rest in front of the new one for this photo, which has four A4 pages of sheet music sitting on it.  The original was inadequate at holding just one sheet, it'd droop over backwards unless you had very stiff paper.  With two sheets, it sometimes managed (if they were taped together, their join might resist flopping over the back of the music rest).  And it might sort-of manage three sheets taped together, hanging past the edges.  But dealing with multiple separate sheets was a major pain, they had to be clipped to something.  Now, I won't have to face that problem again.

And I'm tempted to do something similar with my organ's music rest.  It's similarly short, though is around three pages wide, and has a very small lip at the bottom, so some things like to cascade off the front.  I've spent many years sitting sheets lower down into the finger hold of the pull down keyboard cover.