BAB= Base Attack Bonus
As for T20: for me, it's quite playable, and has a feel like a cross between D&D 3 and Mega Traveller. I much prefer mega.
As to "gaps" in MT's craft system: not many, and only two major ones I've found: 98%+ efficiency of Grav Modules power to Thrust, and Armor taking no volume..... But then I've also got Hard Times, COACC, and the Challenge article Wood Wind Fire and Steel, which completes the process for a wider variety of craft... wider even than FF&S. I can make a canoe with MegaTraveller.... What it is missing is Battle Dress...
As for T20: for me, it's quite playable, and has a feel like a cross between D&D 3 and Mega Traveller. I much prefer mega.
As to "gaps" in MT's craft system: not many, and only two major ones I've found: 98%+ efficiency of Grav Modules power to Thrust, and Armor taking no volume..... But then I've also got Hard Times, COACC, and the Challenge article Wood Wind Fire and Steel, which completes the process for a wider variety of craft... wider even than FF&S. I can make a canoe with MegaTraveller.... What it is missing is Battle Dress...