Here it is!  The much-needed redesign of my original 32-note pipe organ.

Update June 23/26:  I've added three .zip files to the project containing the STEP files for all the parts, for those who want to use other slicers.

Build instruction videos are partially released.

Part 1:  The keyboard's static parts

Part 2:  The Keyboard's moving parts

Part 3:  The stop action

Part 4:  Assembling the raw pipes

Part 5:  Voicing: getting the pipes to sound right

Part 6:  The Principal pipes (Apologies, I've been slacking on this for a while.)

Sound demo:  As of release time, this is what mine sounds like.  My voicing isn't perfect, and the wind pressure isn't regulated.

Older sound demo:

This redesign is sort of compatible with the old design's pipes.  They can be placed in the toeboard and played, but they'll easily fall out if disturbed.

Keyboard:  

• 32 keys from G3 to D6.
• Standard size in X and Z.
• Slightly miniaturized in Y direction.
• A415/A392/A466 historical pitches can be used, but the keytops all need to be removed and reinstalled individually.

Stops:

• 2 ⅔' Stopped flute
• 1 ⅓' String principal
• Stop action moves left-to-right.  Right is “pulled” and left is “pushed.”

Features:

• Sticker action with pallet valves.
• Keyboard mechanism snaps together and disassembles with only needle-nose pliers.
• Wind reservoir closes using elastics or string to compress a foam seal.
• Can be carried fully assembled.
• 204 printed parts for the keyboard, plus 158 for the stopped flute pipes and 139 for the string principal pipes.  Takes quite a while to build.
• Total air leakage is less than one pipe's worth.

Non-printed parts required:

• 32 pcs. 0.5×6×20mm compression springs (on Amazon - Not one of the sizes on Maker's Supply.)
• 1x10mm foam weather stripping tape (on Amazon - Listing has incorrect dimensions in inches, but metric dimensions correct.)
• 1x10mm felt tape (on Amazon - Cut 10mm wide strips.  You can also use foam instead, but make it 2mm wide instead of 10mm.)
• Medium-viscosity superglue and baking soda (NaHCO3)
• 3mm aluminum jewelry wire
• Cork grease
• Compatible with:  1 ½" vinyl tubing (on Amazon)

I voiced my test unit at 65mm (2 5/8") wind pressure.  In my 130ft² acoustically treated bedroom, a single pipe produces 80~85 dBA from the player's perspective, and chords can exceed 90 dBA, but it feels even louder because the sound is quite narrow-band.  This is too loud:  It will quickly cause ear fatigue, with a long-term risk of hearing damage.  I recommend using lower pressure than I did, like maybe 35~50 mm (1½~2"), if building for personal or studio use in a small space.