Well, when the chain is new the 1/4" of take up will be enough to tension a chain that has a 1/2" pitch. But as the chain wears this ability can become too little take up over time.


I have no experience with the BB in question but simple math and years of both tandem and shop experience suggests things wear and initial adjustments need redoing as wear builds up.


In theory a bike could be made with a chain run length (chainstay length) that is designed for a set cog/ring teeth count set up and thus the Bb would only be slightly wound forward initially. As the chain wore the Bb could be rotated further forward bit by bit as needed. But if the actual chain stay length and cog/ring combo has the BB already run out a bunch initially then further adjustments might get lost.


BTW are you familiar with half links? Do you know if your chain can accept one? There are BMX chains with each link a half ling design but I don't know if this type (pintle?) of chain will work on the cog/ring you have.


There is a reason that Rohloff bikes usually have a traditional eccentric BB, sliding drop outs or swinging drop outs. Andy