Well... I did want a lot of heavy medium lasers...

[Fear Factory]

Hopefully I did this right.  I didn't want to be really cheap and go 15 tons so it's a bit of a glass cannon.

Praetorian (Yeah, think Alien) Ultraheavy Protomech

Mass:  12 tons
MP:  5/8(10)

Internal Structure:  1,200 kg
Engine (100):  3000  kg
     + MASC:  480 kg
Jump Jets:  None
Cockpit:  750 kg
Armor:  2500 kg

     H:  5
     T:  17
     A:  6
     L:  10
     MG:  6

Weapons:  4050 kg

  2 Heavy Medium Lasers (Torso)
  1 Heavy Medium Laser (Main Gun)

[ANS Kamas P81]

you have to buy full heat sinks for all weapons.  21 HS at 250kg is 5250 kilos alone...

[Fear Factory]

See, I knew I did something wrong.   #P

[Red Pins]

...Want to borrow the rules for ELMs from my AU?  They're 10-19 tons, and the construction rules need a try.  Game rules are almost done - they need a trial run, too.

FYI, the standard 12-ton is 7/11, 46 armor in 6 locations, with 4 RL-10 and twin ER-ML and ER-SmL.  The 19-ton carries a IS large laser.