I thought you might like the pneumatic engine i built : r/legotechnic
TRCS Technique Pneumatic Building Block Kit 469 Parts Technical Spare Parts Set Pneumatic Compressor MOC Building Toy Compatible with Lego : Amazon.com.be: Toys
Sariel.pl » Compressors
LEGO IDEAS - Jackhammer and compressor
LEGO Compact Pneumatic Compressor/Valve Unit [WITH INSTRUCTIONS!] - YouTube
Lego Mini Pneumatic PUMP + CYLINDER (technic,switch,air,tank,tubing, compressor) | eBay