[Kristoffer O]

Hmm, I just realized that it will not be possible to make my suggested change.

However research can go on beyond lvl 9. So it should be possible to mod a bit.

Current cost lvls:

lvl
9: 1100 * researchcost
10: 1780
11: 3000
12: 4000
13: 5000

Thus it is possible to move all lvl 7+ up one or a few lvls (making lvl 7 empty)

Suggested fix: Difficult research
Lvl 2-> lvl 1
Lvl 7-> lvl 8
Lvl 8-> lvl 10
Lvl 9-> lvl 12

This leaves lvl 7, 9 and 11 empty.
7+8 costs (420+680)*researchcost
9+10 costs (1100+1780)*researchcost
11+12 costs (3000+4000)*researchcost

Might even work with standard research.

If these costs are unfit I can change them before the patch, but it will not be possible to make another grading without a more thorough fix.