I’ve devised my own firmware for the RFD900 with changes I shall not divulge here. Fortunately the changes have been effective. I’ve been able to download an image 4.5km away in 8 minutes. The link was substantially more stable. It was extremely pleasing to start to see some success after such a very dis-satisfying start.
There are many enhancements that I still wish to make to make use of the hardware/software easier for myself, in terms of ease of use and in terms of getting more feedback, so I know how ‘well’ it is performing.