And apply glue to the frame in the available gap (Mistake number two here but I'll tell you what it is in a bit) leaving it a little bit shy of the outer circumference for squashage.

Once you're happy that it's perfectly central, peel back the surround between two clothe's pegs

After that, turn it back to red peg 12 o'clock and double check that it didn't move. I spent about twenty minutes doing this over and over again. Bit tedious but I'm sure it will be worth it in the long run. If a job's worth doing, it's worth doing well!

Moving slightly if neccesary

Slacken off the peg at twelve o'clock (I chose to use a red peg here to keep track of it) You now need to move the surround slightly to the left just a teeny bit then re-attatch the peg. A small movement will make a big difference so only move it slightly, we're talking less than the width of a gnat's ball hair! Do the same with the bottom

Then do the same with your left thumb. If the rasping is louder with your right thumb, then the cone needs moving to the left.

The cone should be able to move in and out freely without rasping the coil. With you right thumb only, push the cone in a couple of times. You should hear the coil rasping. BTW you need to have silence in the room while you do this.

Thanks for that Kelly Joe, and good luck with yours. If yours don't work because you followed my instructions, please don't sue me. Now, as Chris pointed out earlier, it is absolutely imperative that the cones are centered properly before gluing to the frames. I did it like this.... First attatch four clothes pegs around the frame, clasping

Wow! What a good memory you have Yann. I must have told you this in Struer. At one point I was going to Lorient about once a week but only down to the docks with fish that Bretons had landed in the north of Scotland. Not quite as exotic as the discus etc but I did once deliver a 14 stone halibut! That's heavier than me. Never actually got to go

kwillers: By the way - is there a self help group for B&O addicts Sorry mate. There is absolutely nothing you can do about it. You have caught the Beovirus and it's uncurable. The only thing you can do is learn to live with it and keep company with other sufferers. Andy T.