Hi Dave
Is this the install you had the htdig error on? I have not done any recent installs of TDE on Raspbian Lite, but I didn't get an htdig error during install and first boot went directly to the TDE Display Manager.
Yes, I suppose that the sd-card was to small (2 GB only). Now I use a bigger sd-card and the q4os image which has trinity installed and it runs pretty good.
Many thanks for your help Rolf