Here's the problem in a real world scenario.

(no preference, just motors I had on-hand at the time)

Trinity D4 with HT rotor: 21 IR 35 Inductance
Maclan Team Edition with HT rotor: 20 IR 33 Inductance
Team Scream "The One": 18 IR 24 Inductance

All 3 are Roar legal. The TSR is really a 1/12th motor as it loses it's true benefit in a TC. But how exactly do you set a "tech limit" in this day and age? Answer....you can't. Roar took away most of the limiting factors in their rules, so sky's the limit now...or should I say "basement"?