I run the S650 machine with a BC blower. There are 4 ports on the side of the machine - bad design if you ask me -at least the handle that is to protect it. When I hook up the blower the two big hoses are next to impossible to get on and then to remove. I hate it! I spoke to the dealer and he said well make sure pressure etc is off. Well I have other attachments as well and they work nicely - little push on and off but they work good. Is there something else I should know? Change ends? What else can be done?