Here is the version I came up with after playtesting the 5D some more. While the Jump Jets offer something unique you can go a different way and bump the LRM pack up to an LRM-15. This gives it some throw weight at range and allows the mech to roll with firesupport units or perform indirect attacks. The extra LRMs should be able to soften enemies up more before bringing the big gun online. By adding two medium lasers this gives the ability to crit seek for your own AC/20 fire. Something the HBK holds over the 5D.
BattleMech Technical Readout
Name/Model: Thunderbolt TDR-5D2
Designer: Vonshroom
Source(s): Custom Mordel.Net Units
Technology: Inner Sphere
Technology Rating: D
Tonnage: 65
Configuration: Biped BattleMech
Era/Year: Succession Wars / 2880
Rules (Current): Introductory
Rules (Era): Introductory
Rules (Year): Introductory
Total Cost: 5,483,060 C-Bills
Battle Value: 1,366
Chassis: Standard
Power Plant: 260 Fusion
Walking Speed: 43.2 kph
Maximum Speed: 64.8 kph
Jump Jets: None
Jump Capacity: None
Armor: Standard
Armament:
1 Autocannon/20
1 LRM 15
2 Medium Lasers
Manufacturer: Unknown
Primary Factory: Unknown
Communications: Unknown
Targeting & Tracking: Unknown
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Equipment Mass
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Internal Structure: Standard 6.50
Engine: 260 Fusion 13.50
Walking MP: 4
Running MP: 6
Jumping MP: 0
Heat Sinks (Single): 10 0.00
Gyro: Standard 3.00
Cockpit: Standard 3.00
Armor Factor: 208 13.00
Type: Standard
Internal Armor
Structure Value
Head: 3 9
Center Torso: 21 30
Center Torso (rear): 11
R/L Torso: 15 24
R/L Torso (rear): 6
R/L Arm: 10 20
R/L Leg: 15 29
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Weapons and Ammo Location Critical Tonnage
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Autocannon/20 RT 10 14.00
Autocannon/20 (Ammo 10) RT 2 2.00
LRM 15 LT 3 7.00
LRM 15 (Ammo

LT 1 1.00
2 Medium Lasers LT 2 2.00
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Alpha Strike Statistics
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Point Value (PV): 36
TP: BM, SZ: 3, TMM: 1, MV: 8"
Damage: (S) 3 / (M) 3 / (L) 1, OV: 1
Armor (A): 7, Structure (S): 5
Specials: AC1/1/-, IF1