Now that MegaMekLab has fixed some bugs with superheavy mech designs, I've been going in and experimenting with turning mechs superheavy by doubling their size, just to see what would happen. Here is my take on the MSH-9HKR Mackie "Kill-Roy's Little Buddy" from Era Report: 2750 (in the Martial Olympiad mini-campaign):
Mackie MkII "Kill-Roy's Big Buddy" MSH-9HKR-2
IS experimental
200 tons
BV: 3,354
Cost: 79,771,000 C-bills
Movement: 2/3
Engine: 400 XL
Heat Sinks: 24 [48]
Gyro: Superheavy Gyro
Internal: 298 (Endo-Composite)
Armor: 584/599
Internal Armor
--------------------------------------
Center Torso 60 90
Center Torso (rear) 30
Right Torso 42 62
Right Torso (rear) 20
Left Torso 42 62
Left Torso (rear) 20
Right Arm 33 64
Left Arm 33 64
Right Leg 42 80
Left Leg 42 80
Weapon Loc Heat
----------------------------------------
LB 10-X AC RA 2
LB 10-X AC RA 2
PPC RA 10
PPC LA 10
PPC RA 10
PPC LA 10
LB 10-X AC LA 2
LB 10-X AC LA 2
Ammo Loc Shots
----------------------------------------
LB 10-X AC Ammo RT 10
LB 10-X AC Ammo RT 10
LB 10-X AC Ammo RT 10
LB 10-X Cluster Ammo LT 10
LB 10-X Cluster Ammo LT 10
LB 10-X Cluster Ammo LT 10
LB 10-X Cluster Ammo LT 10
LB 10-X AC Ammo RT 10
Equipment Loc
----------------------------------
Endo-Composite CT
Endo-Composite CT
Endo-Composite CT
Endo-Composite CT
CASE II RT
CASE II LT