I had somehow noticed some similarities between the MinorRace_TechTree of TA and the default DA 'structure' but as soon as i loaded the DA version in the tech editor it ***seemed*** like that process would screw up the essentials of that specific file and render it useless or even undetectable. Maybe i got it all wrong when i first tried that.
IIRC, some pre-requisites were at alternate locations and thus failed to deploy a similar or exact DA structure.
I sure will have to work a bit further on this and assume The MinorRace_TT reference is the solution, thks....
EDIT; omg, now i know what happened. The default MinorRace_TechTree wasn't in the core game folder as it should! Maybe it was deleted somehow in the past.
EDIT2; And, that aside from a series of 'Willingness to Trade' lines & None-Groups & the extra TotA specific technos, the MAIN DA_techtree shouldn't be that hard to matchup after careful editing!