+2 tons of free space Heat neutral, smurfy gives wrong numbers. In game heat managment is 1,7. For more dakka change lbx's for ultras but you wont be heat neutral any longer, for less ammo dependancy strip one gauss and replace it with 2ERLL and heatsinks. note: Im aware of existence of SniperCzar's "Bofors", however this thing was developed and tinkered without any knowlege of it as i wasn't observing MechSpecs for some longer time till now, beacouse that, its put here (and probably has 2 tons wasted due to TC).
With max ammo, i had more than 2 tons left after breaking 1k, and even with that amount (40/375), i never managed to spend it all, thus 2t free space left to anyone to tinker with. Its up to You what will end there. Is flexibility a flaw?
leaving 2 tons just for us to play with is kinda bad... just replace the TC MKII with an MKIV and you're set. although the TC doesnt help the LBX, maybe use uac's
It's a bit different but maybe you could try something like this. or this with similar effect. You're going to still have the gauss and more powerful LBX and the MLas gives you some extra firepower while benefitting from the TC.