I believe Pig9r (r3owners.net) said he got them under the Bearclaw.
Yes the 2780's will fit under the bearclaw without modification. A little snug but it will fit. I went from undertank to triple set up. I would like to do something else though.
Anyone still have the photo of the modified bearclaw with the single filter sticking out in the front? I think it had a single headlight also..