+ Multiple Research Labs are needed to reach higher tiers of research.

i have a thought, what if instead of just having multiple research facilities to gain tiers of tech, you could upgrade the research centers as well.

lets say,
1 normal research facility gives you 10 research capacity points,
2 would give you 20... and so on.

after the research center is built, and certain tech requirements are met, it can be upgraded (like a planet) to produce more than 10 points. maybe a +5 or so.
each tier requires X numberof research capacity points to 'open up'

now, as the research system stands now, there are 2 sections, 1 for combat and the other for planetary techs. perhaps the type of upgrade would provide the bonus to one or the other. for example: if i upgrade my research center with a 'combat test facility' i gain a bonus to my combat research capacity points.

just a thought