you mean a wheel channel like the centipede one? im not sure what you mean about the channel. we havent really considered anything like it because our market doesnt really have a matthews or similar dolly in general to ride on it. sorry though cant hire you, we only work with independent contractors. 
however, a good design always has its buyers...
the wheels on the centipede dont actually rotate independently. they are actually just like our 32 wheel one foot kits, but each 8 wheel cluster rotates independently. it needs a 10' diameter curve to let the wheels turn without kinking. when we eventually release the curved track kits ours will be pretty much an equivilent sans the wheel channels.
as far as bending the tubing in a machine shop they would need a pretty large bender but it should work fine. sounds like your into making good solutions. you should check out the red camera contest.
however, a good design always has its buyers... the wheels on the centipede dont actually rotate independently. they are actually just like our 32 wheel one foot kits, but each 8 wheel cluster rotates independently. it needs a 10' diameter curve to let the wheels turn without kinking. when we eventually release the curved track kits ours will be pretty much an equivilent sans the wheel channels.
as far as bending the tubing in a machine shop they would need a pretty large bender but it should work fine. sounds like your into making good solutions. you should check out the red camera contest.
kidding