The singlespeed has a bash ring... the Voodoo (1x7 still has the big ring up front as well as the middle one - but no mech)
Was thinking about chain guides since seeing one on someones bike (on here) the other day... could've been one of yours elPedro, can't be sure.
Would one of the downhill contraptions work in that respect??
Searched for seat tube mounted ones with little success -.. i.e. didn't find any