I'm definitely not the right person to be taking advice from on DIY, but i dont think an aluminum foil ball would work either, it will still have a lot of air in it, it'll just be compact air, your better off making a mold or melting the aluminum into a ballcaleb said:aluminium tape 'ey... il have a look for it.
but... if you scrunched up a piece of aluminium foil in a ball and then perhaps drilled indside (or scrunch it up around the module) would this compress or remove the air... im sure it would be WAY more effective than just wrapping it around.
but i will try washers if i can find some that give a tight sqeeze.
thebucketmouse said:about using washers, can i use regular galvy steel washers or should i look for aluminum ones?