ls1 rocker cover inline filter

[ryan101]

Has any one ever put a little clear plastic filter between the driver side rocker cover and the throttle ( there is foot long hose there)?
If so what size filter do I need?
I already have a catch can ( catch about tablespoon every 1000km or so)
I noticed the other day that a tiny bit of oil from that pipe gets in to the throttle body still so I wana stop it