startrekmakingguy Starting with the original reactor and revising the reactor.txt using,
replace all of [2, 2] to [3, 3] and
replace all of [1, 1] to [1.5, 1.5]
should give you a functioning 3 by 3 reactor.
Note: This will just scale up the images and then correct centering; [1.5, 1.5] being the new center.