[Lemmy]

OK, what I meant to say is, instead of this

Prop I -> Prop II -> Prop III -> Prop IV -> Prop V ...
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,|--> HEF Weapons

you have this

Prop I-IV -> Prop V -> Prop VI -> Prop VII ...
,,,,,,,,|--> HEF Weapons

hmm, yes, but then when you would click on the Prop I-IV button, the popup window with the listing of the component would contain too much information, about all those 4 techs.
I thought about it when i started, but it would overcomplicate things because then one button should be able to refer to multiple techlevels instead of just one.