thanks guys for all the advice!... lets see if i can answer everything first....i have been using this "na" style burner but have wanted a blown burner also i have been doing alot of reading and watchin video's of how they work and the only differences than doing what i asked about is usually the air comes from behind the gas not the side as it would with this plan. Also the tubes are usually 1 inch at the flame end instead of 3/4. From what i have read the blown style uses less propane and can usually get hotter. What i was thinking if i did what i was asking about maybe i could have the best of both worlds where as if i screwed in a attachment and a tube from a blower in the side it would act as a blown burner but if i unscrewed that tube and attachment it would go back to working like a NA burner. Ok lastly i admit i dont know EVERYTHING about these burners but i do understand how the NA works, I built the one i have pritty much exactly the same as pic above. It works great not saying it doesnt i was planing on building a blown burner from scratch but figured lets find out if a 2in1 type thing is possible. i understand the high pressure gas is what sucks the air in. I guess i was just using the wrong name but you have to admit ALOT of people call these "venturi burners". I understand enough how to make a blown burner from scratch. I was curious if any one has done what i was talking about meaning the air from the side instead of the back and the size of the pipes as stated above. Guess ill have to just go back to original plan and make a separate burner seems to be the right way to do it.