As the voting is starting:
[X] Plan: Hammer-class Tank Chassis, System Slots And Crew Armor Edition
-[X] Configuration: Fully Recessed [EXPERIMENTAL]
-[X] Type: Plasma Drive [EXPERIMENTAL] (+17 EP, -2 slots)
-[X] Maneuverability x1 (+1 EP)
-[X] Strength x2 (+2 EP, +4 slots)
-[X] Stability x2 (+2 EP)
-[X] Power Plant: Psykrystal Capacitractor [EXPERIMENTAL] (+5 EP)
-[X] Basic Armor: Heavy (+12 EP)
-[X] Enhanced Armor : Crew Compartment (+10 EP)
-[X] Weapons Mounts: Default
-[X] Crew Spaces: Fighting Compartment
-[X] Defense System: Holo-Field [EXPERIMENTAL] (+11 EP, -1 slot)
-[X] Defense System : Grav-Shield Generator [EXPERIMENTAL] (+18 EP, -2 slots)
-[X] Defense System: Energy-Dispersion Barrier Generator [EXPERIMENTAL] (+9 EP, -1 slot)
-[X] Configuration: 3 Vehicle Weapons, 4 Slots Remaining
DarkLight140 last iteration on the hammer.
Did say i was going to vote for this as it's pretty good as is.
Also surprisingly cheap for the amount of defenses + weaponry it has.
Cost 87 EP
Likely end cost: ~307 EP with full outfit + second grav shield
[X] Plan: Hammer-class Tank Chassis, extra engine v2
-[X] Configuration: Fully Recessed [EXPERIMENTAL]
-[X] Type: Plasma Drive [EXPERIMENTAL] (+17 EP, -2 slots)
-[X] Enhance Payload x2 (+34)
-[X] Maneuverability x3 (+3 EP)
-[X] Stability x2 (+2 EP)
-[X] Power Plant: Psykrystal Capacitractor [EXPERIMENTAL] (+5 EP)
-[X] Basic Armor: Heavy (+12 EP)
-[X] Enhanced Armor : Crew Compartment 10 EP
-[X] Weapons Mounts: Default
-[X] Crew Spaces: Fighting Compartment
-[X] Basic Defense : Refractor Field +2 EP
-[X] Defense System: Holo-Field [EXPERIMENTAL] (+11 EP, -1 slot)
-[X] Defense System : Grav-Shield Generator [EXPERIMENTAL] (+18 EP, -2 slots)
-[X] Defense System: Energy-Dispersion Barrier Generator [EXPERIMENTAL] (+9 EP, -1 slot)
-[X] Configuration: 3 Vehicle Weapons 4 Slots Remaining
Cost 122 EP
Likely end cost: ~343 EP with full outfit + second grav shield
[X] Plan: Hammer-class Tank Chassis, Starlight Reactor
-[X] Configuration: Fully Recessed [EXPERIMENTAL]
-[X] Type: Plasma Drive [EXPERIMENTAL] (+17 EP, -2 slots)
-[X] Enhance Payload x1 (+17)
-[X] Maneuverability x3 (+3 EP)
-[X] Stability x2 (+2 EP)
-[X] Power Plant : Starlight Reactor [EXPERIMENTAL] 4EP +6 slots
-[X] Basic Armor: Heavy (+12 EP)
-[X] Enhanced Armor : Crew Compartment +10 EP
-[X] Weapons Mounts: Default
-[X] Crew Spaces: Fighting Compartment
-[X] Basic Defense : Refractor Field +2 EP
-[X] Defense System: Holo-Field [EXPERIMENTAL] -2 System slots and +16 EP standard
-[X] Defense System : Grav-Shield Generator [EXPERIMENTAL] -3 System slots and +27 EP
-[X] Defense System: Energy-Dispersion Barrier Generator [EXPERIMENTAL] -3 System slots and +14 EP
-[X] Configuration: 3 Vehicle Weapons, 4 Slots Remaining
Cost 126EP
Likely end cost: ~346EP with full outfit + second grav shield
Overall very solid baseline chassis, the more expensive version go for more mobility but pay for that a with the engines + having one more defense layer with the Refractor Field.
The Starlight version might also have a (much) longer operating time.
Lots of potential uses cases with different loadouts as tank, Anti Air, Anti infantry might also make for a good small SPG setup.
What it can't do is transport troops, but for that we just pretty explicitly made an iteration of the light grav vehicle to do just that job.
Edit: Approval vote
[X] Plan: Fata Morgana-class Medium Battle Tank Chassis