I got my loom threaded today with a narrow warp but am having trouble getting the harnesses to raise now that there is warp tension on the harnesses. What size air compressor are you weavers using? AVL guy told me I need a compressor capable of 10cfm. I looked at specs for a 2.5 hp and it was only 6.4 cfm. I find it hard to believe it take that big of a compressor to run this thing. It is a 10 foot professional manual dobby loom.