Re: My first build to sell. Sold.
Landspeed, Please do not get me wrong, I'm not picking your bike apart. If you could determine the chain combinations to use on all the same frames you could eliminate stock chain tensioner. I'm sure you have read the stories of there malfunctions with catastrophic results.
I'm thinking this would give you piece of mind about the safety of the bikes you are selling and you won't be replacing rear wheels for free. I hope you do well!