This is absolutely crazy to me but its my kinda crazy
Having watched that peco 200 video recently, ill certainly entertain the idea since the space advantages are clear and i love a good micro.
I know nothing about T scale I will admit but i did investigate Z recently and i dont think I could go much smaller than 6.5mm gauge track and mechanisms.
If Z gauge was feasible. you can easily get points and set track as well as flexitrack. the cheapest running mechanism costs 30 euro or so from rokuhan
Dont let this deter you, people said the same things about N gauge for years.
one thing is, ive been told to expect a lot more track and wheel cleaning with this h0f scale, logically this will intensify further if we go down to T.