Yep... one at a time for me! LolI have no issues with railcloths coming loose on Valleys using 3m-77 I would never use it on a bedcloth!
I have also used Weldwood in a pinch and it holds, it just takes way longer to cure than RKC250, Parabond M250 or Fasbond N-10.
I know you are also "casually" doing the Valleys you service, so time is not so much of an issue.
I do 4 Valley tables at a time, stuff has to cure quick
TFT