I want to thank you all, for the warm welcome and prompt answers! I will see to what you suggest carefully. This forum is very alive and helpfull, and you made me feel at home from the start.
I have never built a bike before and it seems quite difficult to me, with all the different parts that have to fit each other. BBs lengths, square taper, isis etc. Adding to the project the small budget, and the fact that here in greece, finding trials parts is sci-fi, it looks like a loooong time to completion. Anyway i have many questions that i will post as they come to my mind.
I emailed 3 trials shops at May 23, about the hanger and bb size, and ONLY Adam from tartybikes bothered to answer me and immediately too! Very helpfull, very informative and very friendly. Guess whom i will buy from... The problem is he wasn't 100% sure about the hanger and i have to identify visually if it matches one of his. Looks like a puzzle to me As for the internal headset he said that he doesn't carry one and maybe the head tube is very shallow, so the only people who sell a headset to fit are www.supercycles.co.uk who don't answer my email
I measured the BB width and is 73mm but what about the spline width? What size do i need in order to have a somewhat straight chainline with the rear derailleur? Single speed would be nice but i need to ride to work, and a dirt bike ratio like 36-16, i think is not suited for trials use.
So far i have the frame, forks, pedals and handlebar, photos and specs will follow and maybe a mini diary of the built..
Lastly i would like you to forgive me of any syntax or spelling errors, as english is not my native language.