It looks as though you may be right bigted. I went to my faviourite place looking for a disk an blades for this machine and found out that they dont make blades and disk for a 16" base

and so upon further discussion they let me have a bar blade that might fit. It did with a bit of modifiying of the boss. It sits up about an inch from the bottom of the guard It will cut longrass but It will ony cut down to about an inch high. The mower has only been made out of bits &pieces so it will only be used for long grass

Anyway no I have to concentrate on getting the cantancerous motor to keep running. At least it keeps me occupied.