Need opinions about making a ballistus from leviathan

[Nekro83]

Ballistus conversion ideas gathering...so...i will mount a twin linked lascannon on one of the arms...now I am trying to figure out where to put the missile launcher...this is my first option...mounting them on the top and leaving a fist on the other arm. (I am using another levi from my IW to try to see the possibile result).
The other option is to mount the launcher on the other arm (but I am still waiting for the 3d printed launcher to arrive, it will be a whirlwind turret one)...what do you think? I d like to hear your honest opinions...both on the overall look and on how much this woukd be acceptable (considering it will have both the correct loadout, and base size).

 

So missiles on top...yes or no?