Nice work & nice photos! Great adapters. Very creative!!

As a cleaning solvent/dehumidifier you could try Isopropyl alcohol 91% (about $5/gal). Works great, absorbs water very well, cooks off easily under vacuum, & leaves no residue. Learned that from an old grey beard HVAC tech 40+ years ago. Make sure you change the oil in the vac pump after using solvents. Some pros change out the vac pump oil after each job. Saves the pump. Nice work & a tip 'o' the hat to you, sir!