I'm thinking of this engine on the WH Yak. There is no provision in the yak for the cannister, but after hearing the sound yours makes on the cannister, I may make some mods to the WH.
I currently have the MVVS26 flying a Taylorcraft, fitted with the BCM Pitts muffler. Whilst its not too bad in terms of noise, the power is being restricted. Luckily, the Taylorcraft doesnt need all the power the engine can give, but this would not be the case with the Yak.

Mike.