After I picked up the GT: Modular Cutter book, I went module-crazy, and came up with this: an optimized Modular Cutter using GT: Core rules, and a Small Cockpit.
I also added a VE feature: A 2-person full LS unit. The cockpit's built-in 6 man-hours will serve as backup.
Later, it turns out it's equal in all respects (volume, mass, cost) to 1/50th a "Total LS" unit from GT.

The classic cutter is 480 tons thrust, masses 69sT, and MCr9.8; mine has 620 tons thrust, 77sT, and costs MCr6.

Ship: Advanced Cutter Space Mass Cost Crew
Class: 50-dT displacement, (20-dT hull) spaces (stons) (MCr) (max)
Features:
20dT VSL robotic Very Heavy Hull
Size: +6 , 3,000sf, 18,000hp 6.00 1.500
Armour: DR 100 , Lifting Body 15.00 0.950
Sealed: 0.003
Bridge: Sm Cockpit 0.5 2.00 1.040 1
MDrives: 620 tons thrust 15.5 52.70 2.480
Features:
Redundant Full 2 person Life Support 0.15 0.015 2
Total Compartmentalization 1.20 0.012
Totals: 16 77.05 6.000

Preformance:
Total Empty Mass: 77.05 (from above)
Average Cargo Mass: 100.00 (720 sT Max)
Total Loaded Mass: 177.05
Acceleration (Gs): 8.04 Empty (Limited to 2G due to stress)
Acceleration (Gs): 3.50 Loaded (100sT cargo)
Acceleration (Gs): 0.78 Max Load (720sT cargo)
Air Speed: 3,938 mph
Standard Cutter: 6.40 Empty (again, limited to 2G)
Gs: 2.74 Loaded (100sT cargo)
Air Speed 1,200 mph