So, 'cause I'm curious, and learning, what's a "TMG" class?
And, within "Single Engined Piston" class, what constitutes a "variant"? I presume there would be similar types whose differences did not rise to the level of "variant", and thus require any training? Different fixed prop, fixed gear Cherokees? Or if the pilot has the variable pitch prop sign off going from Piper PA-28-235 to PA-32?
I certainly feel strongly that type/differences training is vital between some aircraft models (class? type?), such as a pilot new to tailwheel, new to floats, new to amphibian, new to reversing propeller, new to flying boat, or new to skis.
I'm interested though as to how "variant" would be categorized for tricycle fixed wheel SEP models?
The rules I fly by in Canada are less stringent, it's more being covered by insurance which will dictate what you can just jump into and fly.....