hey, i use my normal jobo reels without red caps,(dunno what model my reels are but they're the plasticy thingy) and punch out two 120 rolls a pop in the dev.
method is simplier than you can imagine just get yourself some super strong tape that wont go loose wet and youre good to go- you load the first roll then just about when it's up to getting swallowed by the reel you tape that end to the second roll et voila!
hope that helps, atleast for the courage of it...