Squeeking noise from drum when drying

Bit of a long shot, but I once had a machine with a crack at the root of one of the spokes on the big pulley wheel on the end of the drum - made a nasty noise once every turn as the belt tension came on and off that spoke. Good indicator of this would be if you can make the squeak happen when you turn the drum by hand, but this stops when you take the drive belt off. If the noise is still there with the belt off, try removing the hose that leads from the base of the drum to the pump and use the hole that leaves to try and find if anything (stray bra wire?) has got stuck between inner and fixed drums. Check for the same thing between the front edge of the drum and the back of the door seal. On some machines, you can also get a little access where the condenser plugs into the back of the drum. Finally, give the pulley wheel a good shoogle up/down, left/right and back & forth to check the bearings are OK (another long shot). A