Blackspire Stinger as ss chain tensioner?

Just seen this and it looks very neat. Anyone used one as a ss tensioner with success?
http://www.on-one.co.uk/readers-rides/your-ride/q/2712111045_gstock_singlespeed-scandal#Acomment

Martin used one on his Paradox.

Martin used one on his Paradox.

That rings a bell. Problem I can see is that with the bb mounted one, with no ISCG tabs, you would have to undo the bb to release the tension? Not very practical?

I tried it on my old Hardrock. Looked good but I could never get the BB tight enough to hold it in place – it would slip over the course of a few rides.

Gave up and luckily found the magic combo of front ring and rear sprocket to run it without a tensioner.