[secondchance]

A few thoughts:

1. Freezing water inside and bending ( sort of hydro-freeze forming) - tube may crimp and just push the ice out.
2. Possibly fill the tube w/ sand, bend, then blow out sand - worth trying.
3. Look for flexible rod for insertion before bending - another trip to a hobby shop.
4. Use high quality rubber elbows - less desirable but doable.
5. Hopefully bending tool (similar to exhaust pipe bender) can handle most, if not all, bends needed.