hi chad,
id hate to offend, so please take this comment as just my personal opinion, not a critasism.

there are a lot of connections on the pneumatics. i wonder if moving the flipper pivot to the very back of the bot and putting the buffertank in line with the valve might save half the weight of your fitting?

this might let you have a few more sheets of paper on your armour? lol

as i say, no offence meant, i just see a lot of fittings, which are heavy.