I tried apt-get update and apt-get upgrade thinking it might grab what it needs but that was a bad idea as it will not boot at all now. So I may as well start from scratch and try the x98h image.
The wifi chip is the same but item 3 on mine is samsung and item 7 is an FD650 which is referenced on that page as a possible alternative. It might be worth noting the units digital clock display was blank using the vontar image, I expect that was due to the chip mismatch. I'll see how the x98h image goes, if that fails I'll look into termux.
No wifi isn't the end of the world as I can find a use for it just using ethernet but wifi (and bluetooth) would be nice.
Thanks.