I concur. An OF 1400 would be better, but I often find that even a 36mm hose quickly clogs when trying to cut full depth of about 3/4 to 1 inch, e.g. when molding an edge. MFS is a nice tool. Used mine today to inset some magnetic door latches flush with the bottom panel of a cabinet, about 5/8 inch deep. Note that you will need an extra long shank /cutting edge on your router bit due to the ~5/8 inch thickness of the MFS; the bit has to extend through the MFS to reach the workpiece.
Dave R.