In the Mod54 reel the sheets can very easily fall out of the holder with the gentle inversion agitation in my experience, they even fall out of one side and go backwards one notch (when originally loaded properly), so I'm hesitant to put more than one sheet on each side.

I hate using the twirl agitation, but it works well for sheets and with this reel, I do slow gentle twists side to side with the paterson agitator stick with this reel, and haven't had problems with it since. Works well with colour.