You only need two blacks, tops. Stack them together to save weight. Nifty batteries have no place in a heavy.I'm 99% sure that one nifty and one black saves more weight than 2 black stacked together (hell if you are going to go stack the blacks you might as well just try stacking the nifty in the black). Nifties are totally fine if you are using them right.
I'm currently making something like this, but you beat me to it, pah.
switch the squares to blacks
WUUUUUUUUTTTTTTTT??!?!?!?! :eek:(http://i.imgur.com/SXCCKyu.png)
IIRC it was like 5-6 years back when we started calling 6WD popups poopups. Uuurrggh the (somwhat) old age is creeping in D:
As for the design, if you could find a more compact setup, you'll probably be able to free enough weight for armor or another wedge. There are a couple of designs out there with externally attached bursts or the whole thing on a Snapper II. MWs in general are quite easy to build while being flexible in terms of design so you could probably just play around with the bot a little bit and it will easily improve.
looks too slow and probably too bouncy with maces.
i would space your weapons out more and find a way to get more drive and armor. if you're going to mount your weapon motors on a snapper then i would mount the snapper horizontal so it doesn't bounce when it spins.