Originally Posted by DjPorkchop
I am guessing those are 18" risers like everyone else, including me, uses.
It has been said that the elbows cut the air intake by as much as 50%. I do not have any issues with mine but on windy days, mine is pretty much a no go. I thought about loosing the risers and adding more exhaust to mine.
Mr. Bludawg, I believe it was him, has posted numerous times the math involved in figuring intake and exhaust.
Some people extend the lever of the valve up to where it is more easily reached. See this post.
Perhaps someone can post a photo.