Does anyone else use a Uni on their trailblazer? I picked one up today for my daughter quad. I've bought several uni's for other quads in the past, but this is the first one where you can't remove the cage. Should I just oil the outer (red) foam. I could oil the yellow foam around the cage, but it seems like it will be hard to squeeze out the excess. Any suggestions? And please don't say "get a K&N"