chidago/ serves me right for not reading jeep's post carefully enough. He meant the intake
On my steve-modded drive I have the stainless grill he supplies - actually made from pieces of stainless wire but it works like a charm. On my stock (Graupner impellered) ones I have used the grill from a cheap electric mosquito swatter as somebody mentioned on the thread a while ago.
Tiernan85/ glad you have found a cure. There must be a tolerance on these things and I'm just lucky my moulding just happened to be fine and it was only the fibre washer that needed modding. As everyone says, allen/cap screws are the only way to go for motor mounting. As I said before
is a good place to go for rapid delivery of cheap screws for people in the British Isles.