I got a singlespeed bike made out of old road frame with vertical dropouts, something like this:




I am looking for a chain tensioner(tugnut) for such frame, mainly to align rear wheel in frame properly. I don't want ones with pulley wheels(sprung), as I don't have any good experience with them.

I was wondering are there any tensioners of this kind(track frame) but for the frame I own:



I can say that I've tried using these track tensioners on my road frame and even when they didn't work properly, they helped with wheel alignment - ie. I've set wheel in position, tensioned chain with them, then tightened QR skewer and finally loosened tensioners so the chain was tensioned by the wheel held by skewer and not by tensioners themselves.

I've used two for both sides, but I've heard that using one is enough, is that true?


edit: For some reason I can't see my image attachments so I am also posting some random links:
Dropouts: https://surlybikes.com/uploads/blog/FFHwD.jpg
Tensioner: https://saltbmx.com/products-2/chain-tensioner/