Hello Chris, looks great.
I made the same kind of coal loads but I did mine the hard way.
I was working in a coal mine near Delano PA and I happen to pickup few nice lumps of Anthercite coal that were laying along the haul road.
I brought the coal home and washed it in the laundry tub and then let it dry overnight.
I wrapped one lump of coal at a time in an old bath towel and smashed the lump into small bits (this was the worse part)
Once smashed up I used different size kitchen colanders that I bought at a couple different dollar store to separate the different sizes of coal.
Once I did this I basically ended up with three sizes of coal.
The larger lumps I made a couple of coal loads that looked line mine run coal.
The finer coal I made coal loads so it look like processed coal.
I had some coal that was in between the sizes so I covered my tender tops on my MTH steam engines that have just the plastic fake looking molded coal load and covered the tender tops with this medium size coal.
I used Woodland Scenics Hob- B- Tac Glue for the adhesive.
Two of my tenders on my MTH Railking Pennsy I1A I put down the first coat and let it dry overnight
Then I applied more adhesive in the center of each coal load and built up the center of the coal load so it looked like the holster wanted every pound of coal he could pack into the tender.
I am out on the road but when I get home I will send you some pictures.
Again nice job !!!