Re: Listen to your elders
Allen's advice is critical. That tensioner bracket will need to be bent/twisted to get the wheel to align with the centerline of the chain path. This is never mentioned in the poor instructions that come with the kits.
A subject (suggestion) that hasn't been mentioned much lately is using a skateboard wheel as a tensioner. There are several good threads detailing how this is done. Type 'skateboard wheel' into the 'Search' box and see what others have done.
The most important thing is to use a wheel that is one piece and not layered. A good quality urethane wheel seems to work best. Good luck.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"