150% eh? That's going to be a big, big boy when its done!
I'm currently working on the XTZ850R from two years ago - my second attempt, as the first go last year foundered on major problems with the frame and engine, as well as a good number of minor glitches. I have finally got a frame/engine combination which looks as though it will work, but it will be a few weeks before I get the rest done and know for sure.
Then I shall probably get started on the MT-10, so it will be really good to see how you have fared up to that point. Mine will be a little different from yours - I will reduce it to 40%, so it will be a little over a quarter of the linear size.