Okay what about how much smoke these things put out via crank & rocker? I seem to have a fair bit, Gylezy reckons it's normal but mine is smokey. Not much smoke from exhaust though... what does that mean?

Also it spewed oil everywhere (out of the catch can) and spat the filter off when I flogged it, it's almost like there is no baffle in the crank case, or is this what a knife edge crank does (flicking oil everywhere)?

If I fit a PCV valve should I route it after/coming out of the catch can collection? I don;t want it spewing oil into the induction!