Think about it Deerebines, because your arguments do not hold water. If Deere's was too scared to market the bi-rotor because it would hurt resale, why did they come out with the STSIJ The answer is this: you make the best product you can and sell it for a profit. The used market will fluctuate up and down with supply and demand, but that happens anyway and is the curse of all combine builders. Resale is a huge problem for all makers, but it doesn't have much to do with what STYlE of combine you build. There are far fewer CTS combines out there and their value has dropped much fast than the old conventionals. If you do what you suggest, keep better products from the market, don't keep improving your product, others catch up and you don't sell ANYTHING. You DIE. The field is littered with outfits that didn't keep improving and when bankrupt. If the bi-rotor was that good, they would have built it. End of story. No question. As for what prototypes Deere did and didn't have, Deere has been testing rotaries for over thirty years. All kinds of prototypes, including your bi-rotor, never made it. Most likely it failed Deere's "all crops, all conditions" rule. You say it was out of the prototype stage and was "ready." Nope! Until a unit is produced on the assembly line, a testing combine is nothing but a hand-built prototype of which there are lots of examples. "Ready" seems to mean "as good as they can get it" in your mind. As for the STS, they did not have any tooling in place (meaning significant cost to recover) until the summer of 1999 when they shut down the '10 and II series production for several weeks. They hadn't even decided to produce it until mid 1997 when they got it to feed to their satisfaction by using the accelerator and whizzy three-ramp throat. The bi-rotor had been around since long before then and would have been built INSTEAD of the STS IF it had been a better design. It would have cost NO more money to scrap the STS in favor of the bi-rotor anywhere along this time line. They didn't because it wasn't a better machine. The only arguments you have are weak and too tainted by sentimentality. Worse, they don't make business sense. I suppose you think Deere faked the moon landing and that aliens are running the country too.