Laura describes (at Weaving a life) what can happen if you don’t comcentrate, and try to use a reed that is too short for your loom.
When I got my AVL, they had given me another reed tahn what I would have liked (confusion between imperial and metric, no doubt). They would be happy to send me another, but I was eaget to start weaving (well, to start trying to understand this loom, anyway). So I went to the nearest weaving shop to get another, as my old reeds were too narrow to use with a fly-shuttle.
I had seen that the AVL reed was taller than the “normal” (10 cm) reeds, but I did not reflect on tha fact. Home I came, with a “normal” (10 cm) reed in the correct width – proceeded with dressing the loom, threading, sleying the new reed – and could not put the beater top on, as the reed was too short.
What to do? Send for another reed, wait for a week.... ? Or try to fix it?
I bought a piece of aliminum profile, as near to the thickness of the reed sides as possible, and a piece of wood that would slot into the beater top. Glued them together, put the contraption in. It worked, but got a somewhat squishy beat (as the reed could move a bit in the alu profile). So I got some self-adhesive foam (for lining windows to stop draughts) – and I am still using that reed when needed.
(However, when getting new reeds for the AVL I always order 12,5-cm tall, if possible)
Lined with foam:
Slots into beater top: