I've had a few runs with BHO through my extraction pipe, but it looks like there are still trichs on the weed i used. does it work better when its chopped up very finely? My only concern is that the pipe will clog and the gas won't flow through.

I grind the bud I use to do bho, not to dust, just to the average spliff rolling texture and I always use it twice to get as much thc off as possible