fwiw, i built 2 winow and 2 long tengs. especially around the BB area, the long teng had more consistent tolerances, as both BB entered with the same constant force, whereas the winow was less consistent. i have ridden my LT a lot, and only c.200km one of the winows, but honestly with my eyes closed i dont think i can tell them apart, felt nice, fast and stiff, so i guess i can recommend winow. Terry isn't the best at replying to emails either, but he does end up replying.
that new frame looks cool.