I am somewhat more (cautiously!) optimistic when it comes to the future of the OS 46 VXDF, simply because it is a spin off of their successful 46 VX-M marine engine (which appears to have a much larger demand than the DF sector...just compare the prices of the 2 engines and the virtual 100% availability of the -M engine). The only difference between the -DF and -M engines is a thrust washer and cylinderhead. The OS 91, 77 and 25 DF engines did not have that commonality, so they are/were a lot more vulnerable to the bean-counter's axe.

Your summarry of the JHH/Jett dilema hit the nail on the head. Tough problem for both parties, with the modellers and hobby losing as a result. The sad truth is that the DF hobby is vaporizing before our eyes and the writing is on the wall.... If OS cannot justify another production run of the OS 91 VRDF, which is the most popular DF engine in the world by far, what hope is there for the DF hobby, let alone .45 DF??

Time to start saving for a turbine... :-(

Peter