I needed to solve for the way the fines escape by flinging everywhere and have a means to store them until ready for use since this is a continuous flow design.  The garden cart I had in place earlier is used for other purposes and I needed to commit something here that would withstand the elements.  In the spirit of sustainability, this would have been much better if I could source this or a similar poly cart secondhand or similarly.  But as it stands, this little 7 cu. ft. dump cart might just be the perfect thing as the materials can be transported directly to the point of use.

Some more plywood here will help funnel the fines down into the cart.  From this angle, you can see we will need to capture the fines which fall out in both greater depth and width than the cart is capable of catching.  Since the hopper will need to extend above the frame and tangent to the sides of the drum, those longest pieces will be made first.  The panels which will cover spillage both front and rear, will only extend to the frame itself and will be shaped trapezoidal to fit within the other two lateral pieces.

The cart couldn't be a better fit for this original mock up.  We will be able to determine the rate at which we process by logging every time we pull the little cart out to dump it.  Yay for science!  Once the enclosure is built, extending down to the deck blocks, this operation will be much better protected and the cart won't be subject to filling with rainwater.

Having solved for finished product storage (and serendipitously including transport and delivery) makes this a win in my book.  Still a ways to go with this project but we're coming along nicely as I ramp up the gardening and landscaping operations here.