Kuhne 2.4GHz upconverter for Oscar 100

I am told that Kuhne is doing a factory mod to their transverter free of charge to stop it FMing. They are also adding an external reference input, allegedly. There have been reports of poor audio on SSB TX with some of these units and drift. Sounds like newer builds will be much better. I guess they were surprised by how popular these were and had to rush production.

I believe there are other upconverters available too.