So I've gone over all the math and it seems right (I hope!). Anyway because I missed that bit about hover engines weighing a minimum of 20% of the units weight, I had to do some changes.
Qi Shi Strike Transport
Type: Qi Shi Strike Transport
Technology Base: Inner Sphere
Movement Type: Hover
Tonnage: 30
Cost: 2,204,000 (E/X-X-E)
Battle Value: 645
Equipment Mass
Internal Structure: 3
Engine: 140 6
Type: Light Fusion
Cruising MP: 9
Flanking MP: 14
Heat Sinks: 10 0
Control Equipment: 1.5
Lift Equipment: 3
Power Amplifier: 0
Turret: 0.5
Armor Factor (H-F): 99 5
Front: 21
R/L Side: 19/19
Rear: 18
Turret: 22
Weapons and Ammo Location Tonnage
2 x ER Medium Lasers Turret 2
MML 3 Turret 1.5
TAG Turret 1
Battle Armor Compartment Body 4
Ammo (MML 3) 80/66 Body 2
CASE Body 0.5
Type: Qi Shi Strike Transport (Stealth)
Technology Base: Inner Sphere (Experimental)
Movement Type: Hover
Tonnage: 30
Cost: 2,836,000 (E/X-X-E)
Battle Value: 615
Equipment Mass
Internal Structure: 3
Engine: 140 6
Type: Light Fusion
Cruising MP: 9
Flanking MP: 14
Heat Sinks: 10 0
Control Equipment: 1.5
Lift Equipment: 3
Power Amplifier: 0
Turret: 0.5
Armor Factor (VS): 88 5.5
Front: 19
R/L Side: 17/17
Rear: 15
Turret: 20
Weapons and Ammo Location Mass
Light PPC + Capacitor Turret 4
TAG Turret 1
Guardian ECM Suite Body 1.5
Battle Armor Compartment Body 4