I like it, but something is "odd".
It is probably the speed of the Grasshopper and the fact it has an XL engine. The GHR-7K has similar range with 2 Snubs and 2 LPPCs and carries an additional laser and electronics instead of the SRM launcher. While I like infernos, I don't think they add much to the design. The 7K uses endo steel in order to save the weight. You could do the same thing with BK's design and get the same weapons, just minus the SRM and a heat sink or two. Small drop in armor.
You can also go full out and take the XL and the ES and get to 5/8/5, have 4 LLasers and just a hair under max armor. The closest comparison I can draw to his machine is the old Tech Factory Rifleman.
Rifleman RFL-4L
Mass: 60 tons
Tech Base: Inner Sphere
Chassis Config: Biped
Rules Level: Tournament Legal
Era: Clan Invasion
Tech Rating/Era Availability: E/X-X-E-A
Production Year: 3071
Cost: 11,247,200 C-Bills
Battle Value: 1,629
Chassis: Unknown Endo-Steel
Power Plant: Unknown 300 Fusion XL Engine
Walking Speed: 54.0 km/h
Maximum Speed: 86.4 km/h
Jump Jets: None
Jump Capacity: 0 meters
Armor: Unknown Standard Armor
Armament:
4 Large Lasers
1 Medium Laser
2 Small Lasers
Manufacturer: Unknown
Primary Factory: Unknown
Communications System: Unknown
Targeting and Tracking System: Unknown
================================================================================
Equipment Type Rating Mass
--------------------------------------------------------------------------------
Internal Structure: Endo-Steel 99 points 3.00
Internal Locations: 3 LT, 2 RT, 3 LA, 2 RA, 2 LL, 2 RL
Engine: XL Fusion Engine 300 9.50
Walking MP: 5
Running MP: 8
Jumping MP: 0
Heat Sinks: Double Heat Sink 17(34) 7.00
Heat Sink Locations: 2 LT, 1 RT, 1 LA, 1 RA
Gyro: Standard 3.00
Cockpit: Standard 3.00
Actuators: L: SH+UA R: SH+UA
Armor: Standard Armor AV - 200 12.50
Internal Armor
Structure Factor
Head 3 9
Center Torso 20 31
Center Torso (rear) 8
L/R Torso 14 21
L/R Torso (rear) 7
L/R Arm 10 20
L/R Leg 14 28
================================================================================
Equipment Location Heat Critical Mass
--------------------------------------------------------------------------------
2 Large Lasers RA 16 4 10.00
2 Large Lasers LA 16 4 10.00
2 Small Lasers CT 2 2 1.00
Medium Laser HD 3 1 1.00
Free Critical Slots: 5
BattleForce Statistics
MV S (+0) M (+2) L (+4) E (+6) Wt. Ov Armor: 7 Points: 16
5 5 4 0 0 3 0 Structure: 3
Special Abilities: ENE, SRCH, ES, SEAL, SOA
When large lasers are your primary weapon then you want to get in as close as you can as fast as you can. The Grasshopper will have a benefit in broken terrain. In an open area battlefield, it should drop off in its effectiveness.