I just had this talk with Mori a few days ago. I've got a 120 carbon roller with a slip tip, the gun shoots great 75% of the time but once in a while the shooting line catches in the bands. Mori said it's a more combersome combination with the slip tip and I tend to agree, there's a lot to deal with the bands under the gun, the shooting line etc, it's not point and shoot like a regular wood gun. I usually tuck the slip tip dynama under the shooting line, but keep in mind I only bring that gun out when I'm fooling around and usually after I shot a bunch of yellowtail. I know Tanc has has fantastic luck with his but I also know of several guys who missed shots on big seabass this year because the rollergun tangled the shooting line.
I just picked up a used Rob Allen with a mannysub roller and I'm in the process of rerigging it as we speak. This gun will be dedicated to a flopper though, I'm curious to see if that changes the problem.