Wow, you're going to run around in top gear the entire time it's SS? Are you Hulk or something?

If you can do that, why not just run FG/SS all the time? Otherwise, why not put it somewhere in the mid-range part of the freewheel?

*edit* the link does say the tensioner is for 16-23T sprockets. So if you use one of your sprockets within that range it should work.