^^ sorry the fuji track junior was a bit of a joke, as I guessed you wouldn't be that small.
Like I said (not that I really know anything) but I'd have thought a dirt jump frame would be a good idea. The headtube angle on this (full build and overbudget I know) is 69.5 and it looks like with a layback you'd be sitting over the rear wheel.
EDIT: If you're going that way, a random google search came up with this list, which includes some geo angels
^^ sorry the fuji track junior was a bit of a joke, as I guessed you wouldn't be that small.
Like I said (not that I really know anything) but I'd have thought a dirt jump frame would be a good idea. The headtube angle on this (full build and overbudget I know) is 69.5 and it looks like with a layback you'd be sitting over the rear wheel.
EDIT: If you're going that way, a random google search came up with this list, which includes some geo angels
http://free-du.htnet.hr/trials/frames.html
...and ebay has lots, like this with 22hrs no bids and £40