I couldn't leave the reactor on the wagon for concern that the neighbors may think I was building my own Conestoga wagon to go West and strike rich.  The black gold I seek will be made here, in this.  But the real compost will be the friends we made along the way.

The frame was easily mocked up to fit the mock reactor.  Simple 4x4 uprights, 3' each are sat on four deck blocks.  These are supported by 2x6 cut 4' across the axis of the drum and just over 4' 6" in depth.  The joints are butted as you can see at the front bottom where it is left open for access.  Diagonal bracing will be needed but has not yet been added as I've yet to think through the hopper to be built in.

The reactor is simply sat upon the 4x4s at present and has no means of rotation.  Axles will be added and pass through pillow block bearings.  Those will need to sit atop frame components which are not yet present.  A 2x4 may simply be cut to width and attached front and back, and secured flush with the front of the frame.

The means of rotation will be next to solve for.  Two axles will support the reactor, on some kind of fixed wheels.  The axles must also be connected so power transfer is even across all points of contact with the drum.  Power input will be a crank to start.  It will need to be put on a clutch mechanism so it can operate independent of additional power transmission components to be added later on.  Presently, the first obstacle I may need to solve for is ensuring enough coefficient of friction that the drum does not slip and sit still as the axles beneath it rotate.  I may need to investigate options for both gears and belts as means of transferring power.

This was good progress today.  It's situated well enough in the space that I have cleared.  I may attempt a few locations around this area.  But I feel good about finally making this amount of progress.