the front freewheel, while unique to trials shouldn't be an issue for any cycle mechanic with a reasonable IQ, mods are basicly BMXs with no saddle, and different bar and stem and rear wheel size... theres nothing really special on a trials bike, it's not like a high caliber full suspension bike, it's just a very minimalist rigid bike at the end of the day. if i were you, i'd send a picture to tartybikes, and explain your situation and just ask for their opinion, your not a customer (yet ) but they'll help you out cause your a rider, from where i'm sitting as a part time cycle mechanic and bike geek, you do have a problem that they should have sorted before shipping and you would have been unlikely to have noticed without proper guidance from a forum etc. can't say alot more until you go to your lbs