Chain Guides, which one?

I went with an E-13 Hiem which allows a twin ring setup. I know it's not technically what you were looking at but I not everyone knows they exist and it may suit you better? It's been pretty good so far. Superstar do some cheap single guides if you want to try it out without spending too much...

Chain devices are a pain in the ar5e to be honest. But if your running a single ring up front its something your gonna need. I run a 1x9 set up and found that its more important to ensure you have a device at the top more than a chain tensioner at the bottom (simular to what the front mech does). The blackspire stinger that just tensions the chain at bottom will alone not keep the chain on with a single ring set up and will need to be used in conjunction with the front deraileur or another device to work effectively thus ideal for a double set up.
If you use a device like the E13 lg1 then set up is key and not an easy thing to do especially if using the BB mount and not so bad if you have iscg mounts.
I use the Superstar XCR single ring chainguide which so far has worked with out fault. Its cheap, light, robust and you can even adapt it to run along side a bash guard if need be

Why not just use the front mech,,?

adjust the H and L screws so that its in the right place...

Job done and no outlay...

Dave.