Yep, ditto. Plus mine rests against the Fusebox, in actual fact it doesn't move around at all.... And as far as water ingress, never had a problem.
This is the Silicone hose I used 70mm. - 70mm. (£11.50)
http://www.ebay.co.uk/itm/1606043320...84.m1497.l2649
And the little Filter, which you can't see in my picture. (£4.45)
http://www.ebay.co.uk/itm/1806752873...84.m1497.l2649
I already had my Airfilter from quite a while ago which I bought for £40, but I got this one for my son's 2.5 here: (£37.00)
http://www.ebay.co.uk/itm/2508918025...84.m1497.l2649
The thin tubing I had laying around off an old washing machine.....
Hope this helps.......