On a more serious note, Im having trouble with one of my newer designs:

WEIGHT: 100kgs
DIMENSIONS: 140 x 140 x 15 cm
SHAPE: A low dome type shape
DRIVE: 2 S28-400 Magmotors driving 2 wheels, with a fairly narrow wheelbase to increase rotation speed, running at 24v from 4 NiCd packs, with ball castors around the edge to
stabilise it.
SPEED: About 12mph average when driving normally, can get up to 40mph when spinning
GROUND CLEARANCE: 5mm all around, except at the front where the forks make it 0. 1mm in places because of the blades.
ARMOUR: 3mm aluminium on top of 7mm UHMW on the top of the robot, supported by a 4mm Hardox frame underneath with holes drilled to reduce weight. 3mm aluminium baseplate.
WEAPONS: Complicated this...it has an electric lifting arm running off a 1 tonne linear actuator, pivoting from the rear of the robot with two front forks to get underneath opponents. The arm can lift 250kgs easily and extends fully (almost vertical) in about 1.5 seconds. Also, the robot is a full body spinner with an outer 3cm Hardox ring with two blades/teeth, one on each side, made of hardened tool steel set close to the floor (1-2mm) and capable of delivering (energy)
SRIMECH: The lifter
NOTES: Internal components shockproofed to protect it from its own and other peoples spinner hits.

The main problem is the energy for the FBS - I dont quite know how to look a it, considering the shape and the fact I know very little about spinners and the formulas required. The Team Cosmos calculator doesnt seem to work for me, so could someone more experienced with spinning things help me out, and also help me with the general design?