Hi Guys - This question was asked on the construction sticky, but not answered. Can I reliably design a slot port by giving WinIsd a port size of the internal width of the cabinet x 1/2/3 cm and use a slot of the length given? This leads on to how putting a right-angle bend in a port affects things. One design I'm looking at has a circular port length which would only fit into the height of the cab. I don't want the port outlet on the bottom or top because of obstruction by the floor/amp top. Can I put a right-angle bend into it and have it coming out of the back? One last thing - what is the upper limit for vent air speed? Many thanks.