[jimbob]

You should be able to some fun stuff with mounts once the new patch comes out. Perhaps all specialized mounts (large, planet-core, tiny, etc) should have technology requirements! (construction? industry? nanotech? Advanced Materials Science?)

Perhaps the tech area "Patent Laws" should be required for mounts like cheap, premium, etc (as in the P&N mods).

As to your mod.. my only concern is that it will be impossible to figure out what the prerequisities are for specific technologies. Imagine the frustrated player researching just about anything, trying to get to a tech that they know exists, but they just can't find all the prereqs!