Hey Mate,
No none atall. Even up north it didn't seem to get any dust in. I took the filter out a couple of times to check.
It seems to work really well.
If you do get a tube one made by someone, leave the car there when they do it if you can as it will mean they get a neater result
another picture of it slightly in use:
https://www.aulro.com/afvb/images/im...010/11/295.jpg
https://www.aulro.com/afvb/images/im...010/01/802.jpg

