Actually the TTT is longer than the TT - and both fitters at my LBS today took quite some time to help me to understand this I may not be able to understand it clearly myself, but it seemed to make great sense to them - and they work with this stuff all of the time - so I accepted it.

It is the same way with my LHT, and also with my very first bike that I sold.

I then signed off on the design and put down my deposit - my beautiful new frame will be delivered and ready for building in about 5-6 weeks