Really nice build. How did you get a frameset? I'm in the USA, and the Altena's are not available here. I thought about ordering one off Rakuten or Amazon Japan, but wasn't sure how the shipping would work, import taxes (Rakuten & Amazon Japan both required a 3rd party shipper)--I took a pass. Too many "moving parts" to get a bike that should have been sold here in the USA. If you have any suggestions for how to get the Altena or just the frame, let me know.
Same situation applies to Hasa . . . they seem to make a lot of nice stuff, but their ti folder is not available in USA. Jurien helped me buy a TI Swift from Titan Product in China (check out the Titanium Swift thread--a picture of my bike is on one of the last pages).