I used a round cheap model with trays just like you described.
I use to make deer jerky alot in a dehydrator. It was some good stuff, yum, yum. I would make a whole 5 trays worth on sunday and come home from work on monday and the family, including me, would wipe it out by the end of that evening. I started making two trays with red pepper added, 3 trays like normal and that gave me at least two trays to eat on before it was gone as the rest of the family thought my special batch was too hot.
I used a kit similar to this. It’s been awhile back so it may not be the exact one I used.
What I used was 1 pound deer ground sausage and 1 pound deer ground meat mixed together. Added in the season packet that comes with the kit mixed it all together in a large bowl. Filled the gun up with meat and used I think the double barrel looking tip. Squezzed out strips about 4 inches long and placed them all around the tray fitting as many as I could per tray. Took about 6 to 8 hours and filled the house with jerky aroma
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Making deer jerky there’s almost no grease. It will have a few beads of grease on the jerky, I just used a paper towel to dab that off before putting in plastic bags for storage.
Good stuff!!!