I use a Jobo for 4x5 sheets. (It's been so long since I bought it, I don't remember if it's a "Multi-Tank2" or not, but it has sheet reels.)(posted 8300 days ago)I use inversion agitation. Be gentle, and careful. With a liter-and-a- half of solution in the tank, it's heavy.
Mine is a 2-reel affair, but I never load the top reel--just use it for a spacer to keep the bottom reel down. With 2 reels, you'd need 3 liters of solution--too heavy for safe handling, and no space for the developer to re-mix (locally depleted developer mixing with locally fresh developer) during inversion.
I tried PMK once, with fine results using this approach.