Im in a fairly good mood now, so I can give decent help:

WRANGULATOR: Main problem here is that while the design is perfectly sound, I cant see it really being competitive unless you have something with a bit more weight on the ends of the wedges. Id suggest using the 3.6kgs you have spare to make those spikes bigger and heavier, and giving a Kj estimate from impacts would help as well, although Im not sure precisely how youd do that with that shape. Aaron might be able to help with that.

LITTLE BIG BOT: Im assuming its similar to Oblivion 2 here - a low box with the axe set into it. You could state how the axe linkage works (rack and pinion(Thz), acceleration(Hydra/Shunt/Dom 2), chain sprocket (Khz)) and how many fires you have, possibly backing this up with details on how many CO2 bottles and what size (you might be able to get one 1.1kg bottle in giving about 20 uses at 150psi)

TOM: Again, give specifics on gas capacity for the weapon (1 x 2kg tank?), the pressure (full 750psi safely for a flipper) and how many rams power it (useful in case some writer decides you have only one ram and disables your weapon by ripping it out). Possibly bore and stroke sizes as well, but thats getting technical.