Common but not good.

Very little is gained from

3rd a => 3rd b => 3rd c => 3rd b => 3rd a

This is the route my first attempt at a repair took.

Better customer service would come from giving 3rd a more auths. and going

3rd a => Nokia => 3rd a

If 3rd A is not able to handle almost everything then why are they in existance what cost saving do they provide and how do they help improve service.