I think it's quite strange that players can configure the blast power of nukes and reactors, but not ITNT. The ic2 config file has these options:
; Maximum Explosion power of a nuke, where TNT is 4.
nukeExplosionPowerLimit = 100
; Maximum explosion power of a nuclear reactor, where TNT is 4.
reactorExplosionPowerLimit = 100
It seems like there should also be:
; Explosion power of ITNT, where TNT is 4.
itntExplosionPower = 4
The addition of a tweak like this would be greatly appreciated