Ok-i recently came aquired an additional backpack blower. Its a br 400: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2359615461&category=22655&rd=1 to be exact. Here is my question. On my 420 magnum stihl..it has the bigger pipes like all the others (echo 650). These pipes that dont have the curved elbow and have a larger volume to allow more cfm's to come through which supposedly gives you a "better/stronger blow" I was wondering if I shoudl get a 420 pipe kit from my dealer and try and fashion it onto this one to attempt to up the blowing capacity. Thanks for your help!