I recently purchased the IM EXT 100 System and it came with the RFS 39 sump. From my general understanding of things, the fleece roller cannot fit into the mechanical filtration chamber (which seems to be designed for filter socks). I would really rather not use filter socks, so I am wondering if it's possible I could just hang the fleece roller from the wall over into the skimmer chamber? This sump is huge and my skimmer likely won't take up all the space in the chamber (I ordered a Tunze 9410 DOC DC as people suggested) so I'm wondering if this is possible or if I need to consider a different sump altogether if I want to be able to use filter rollers.
