Unicorn!

A 100 dTon Jump 6 ship is kind of a Traveller unicorn.

With the OG Book 2 and Book 5 rules you can't make a J6 ship that small because of the fuel minimums.

GURPS: Traveller Starships rules don't resemble the original Traveller stuff at all.

Erin's Duchess Cup got me to playing with the rules.

With TL12 components, you can make a 100t ship that can jump six and still pull 5.62g loaded with 8.5 dTons of mail.  It's unstreamlined and has a mere 100 DR hull like a cargo ship but there are three staterooms.

This thing is a Hot Rod!

All for a mere 55.98MCr.

For the Duchesses' Fevrchiench I took a standard TL9 Iiken 100t Scout Courier, stripped out a stateroom and changed the engineering core and jump drive to I.Y. -2210 Terran jump-3 designs.  It fits the Retro class rules in that such modifications were made during the Rule of Man for fast courier duty.

The issue is that Viru Sirka and Terran electrical standards aren't the same so the power plant doesn't play smoothly with the maneuver drives and gravitics.

All in all.  4 dTon cargo, 3 staterooms, 6 crew (double occupancy), 1.65g loaded and jump-3 when most of the competition is running higher acceleration and jump-2 should be a winner because you can make the run in 12 jumps instead of 22, saving 20 weeks of travel time!