Home > Catalog > Loom Additions > A-Lift Conversion System (Air-Lifting for the Dobby) A-Lift Conversion System (Air-Lifting for the Dobby) Treadling becoming too much? Try on the A-Lift for size. This nifty device uses air from your compressor to lift the harnesses. And it is the thrifty way to go.The A-Lift fits the following AVL dobby looms: A-Series, Studio Dobby Loom, Production Dobby Loom, Technical Dobby Loom and Folding Dobby Loom.To use an A-Lift, you must provide a compressor cable of producing at least 3CFM at 90PSI. $1,278.00 Part Number 520 Loom Serial Number * Number of Loom Harnesses * Quantity * A-Lift Conversion System (Air-Lifting for the Dobby)