I can't help you much other than the part about Coors granting contracts to farmers with only TR_CR combines is BS. I know lots of Coors growers that use CIH and JD conventional and STS combines. In fact, hardly anybody uses a NH.
It is true about Coors preferring New Holland Twin Rotors over anything else. Stag uses john deere combines for there beer. They dont have to mill it as much since its already pre-ground.
I'm not sure if Coors brewing requires a certain type of combine but I do know that they hire a custom cutter to cut their malt barley. Coors may even own the machines.
We have grown seed beans for two different companies and while neither requires a specific combine they both strongly recremend Axial Flow's and I know at least one of the companies (MBS which is one of the big players in soybean genetic's) uses modified Axial Flow's to harvest their own research plots.
This fall, I had a chance to compare barley samples between my CTS II, a 1680, 2188, 2388, and 9650 STS. Funny thing was you couldn't tell the difference between any of them. They were all very good samples. Plus I know of guy who raises Coors barley who traded a CR 970 in for a 9860 STS. So Coors must not care too much.
I have never heard of any machinery requirements on an ag contract. Coors buys a lot of malting barley in my area and there are almost no CR or TR combines here.
Neighbor has white corn and popcorn contracts. Both contractors "strongly reccomend" axial flows. In fact, the popcorn contracts are the reason he switched in the early 90's.