2,08 kg with Hi-Ten Tubes = few weeks of ride. I now what i'm saying. Cr-Mo and Hi-Ten have almost equal weight, hi-Ten is cheaper but cr-mo is much stronger. So companies that have the cheapest Hi-Ten Frames are make it heavy.
Now Look on your frame:
Super thin backtriangle, and that "DownTown" geometry, so a lot of force will be pointed there.
Don't make my reply as an attack, this is only my own suggestions that i think will help you to build better frames.