I'm a new owner of Standard 120cm 10/10. I am working on a waffle weave towel 37 inch wide.. The draft is 1,2,3,4,3,2 repeat the tie up is 1 - 2- 1,3 -1,2,4-1,2,3 the treadle order 1,2,3,4,5,4,3,2 repeat. When I get to treadle 4 and 5 my shuttle falls through the warp. What am I doing wrong. On my Macomber I had a shuttle race but not on this loom. I have a nice even shed. Do I need a longer shuttle? I'm using an 11 inch boat shuttle.