I have been out of here for the past week preparing for a hurricane (Tampa), and the cleanup afterwards. It was not as bad as it could have been, it turned sooner than expected, but it still left a mess.
I got my check Friday, which turned out to also be a bank holiday, so it won't clear until Tues morning 1am EST (Midnight CST).
I will buy your HTX10 if you still have it. I already have one from eBay, but that will give me a 2nd to also experiment on with my board design. And my 1st gen 980SSB too. Same conversion board, same concept, different frequencies to "shift" from.
And, no, it is not DDS based, I had thought about that too, and have a few iterations based on SI5351 and atmega32u4, but went back to crystals for my design, easier and cheaper to source.