RO-150E has build in dust chute. It can be connected to 27mm hose, but you need squeeze the hose . RO-150 FEQ has detachable dust chute. You can order spare part from any dealer. Some dealers refusing to order spare parts, but you need explain that it's not true. You can check EKAT system on the Fetool USA site for the right part number.
Regards,
VictorL