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The look would be OK for an Vostryan army. The problem would be in the rules. The canon is turret-mounted by the rules. When your LR gets immobilized, you have a problem... But as far as I can see, you have given your LR a handicap this way, so no opponent should have a problem with it.
Also, that battlecannon is going to be fragile as hell in that position. The only thing I can think of to keep it from snapping off every 5 seconds would be to shorten the barrel. Otherwise, setting its shelf back farther on the tank would be best, but take so much converting it's not a good option.
Nice turret though!
Tyranids: 2500 pts
Imperial Guard: 1000 pts
Witch Hunters: 1000 pts
i actually took the las cannon bit out, so it sits steadily in the back.
I like it, its given me some ideas for my vostroyan army...nice work
lol cortex, how many armies do u have???
btw tank looks great, like a WWII tank destroyer....