Hello Col996s
The trick is put your fingers just inside the first hole of the filter,
push it down into the airbox so you palm is now over the first trumpet,
As you pull your hand out, feel around the trumpet making sure its still
covered, the second one is alot easier, it's fiddley but you will know
when its right.
Oh . . just thought did you get a spray for it? I seem to remember mine was sprayed wih a coat of oil.
TopiToo