I agree with Roberd42 as far as the placement of the venting hose. It was my understanding that the gasses from the crankcase (both top cylinder and valve guide blow by) were routed to the air filter to be burned.
Having said that, the crankcase gasses can be vented to air without consequence. I tried to post pic of how I modified a aftermarket air filter to accept the valve guide gasses. For some reason I can't post pictures.
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