I was researching mine for about 6 months, with some help from my dad I got the Headtube/BB/360 Dropouts done (he's a machinest) Then I effectivly gave up!
I may well finish it off if anything ever happens to my ashton.
Everything takes alot of time, it took a couple of saturday mornings to get those bits made, before we even started on a Jig.
The hardesr bit design wise was the BB/chainstay area. Its hard to make on a trials frame, because the chainstays are short, meaning the wheel is close to the BB shell, so you need to make some sort of yoke, or do what we done and made a really wide BB shell that the bottom bracket sat in.
Even shaping the tubes is harder than it first appears.
I gave up with access to all the tools, after buying all the materials, borrowing a brazing kit (Eek, I forgot i have that... :( ) and having an engineer of a dad and a workshop to build it in!
I'l get you a few snaps of all what I done/materials/tools etc!
EDIT: Have a read of these, they have loads of useful stuff in.
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building
http://www.trials-forum.co.uk/forum/index....=Frame+Building