@craigviau
"paratroopers" are a default tech, what that means is that it does not need to be added. Only if you want certain or created techs does "paratroopers" needed to be added.
<attachment name="techAttachment" attachTo="Finns" javaClass="TechAttachment" type="player">
<option name="paratroopers" value="true"/>
</attachment>
A map that has no technologies will still contain all default techs, so this will give Finns the "paratroopers" tech.
Units that do air transport need "isAirTransport" set and a value for "transportCapacity". Units that will be transported by air will need "isAirTransportable" set and a value for "transportCost".
That's it. tech and tech_activation delegates are not necessary. "Tech Development" can be false. And the whole technology section can be bypassed with <technology></technology>.
Cheers...