I've just acquired 4201 and a 4551 drums, intending to use one for 5x4 film. Possibly both. With them came x2 4206 'formatholder's. I've no instructions or experience of Jobo but putting 5x4 sheets into the formatholder and then into the drums seems straightforward enough, if a little fiddly in the light. Not yet tried it in the dark!
I was wondering if anyone had/has any experience of using this kit combination, good or bad?
Do Jobo still make the format holders? If they're any good, I'll try to get hold of a few more.
I'll be manually rolling the drums for now, on a set of up-turned castors screwed to a pvc chopping board (plan A) or buy the rollers (Plan B)

Are there any data sheets for dev times, given that the agitation will be constant but the film surfaces won't be covered at all times, unlike taco inversion method?
Please be gentle, I've only developed 35mm and 120 so far!