Having converted the GWR No 13 with no problems- the brake shoes were not glued in,
I went on to convert the BR No 57, with the brake gear glued in place.
My solution was four vertical cuts behind the brake shoes so releasing the brake yokes and pull rod, leaving the shoes in place.
The brake pull rods and yoke were later glued to the keeper plate as a simple meens of keeping everything correctly located, plus the plate can still be removed.
Much to my annoyance I broke one of the guard irons in this fiddly exercise.
Gordon A
Bristol