[ercoupe-tech] 1320 pound STC question

[heavensd]

My Ercoupe is serial number 244, so I thought that to implement the 1320
pound STC, I had to do the oleo orifice reduction in the MLG.
Browsing the Parts Catalog, I realize for the first time (Duh!) that my
MLG is like Fig 12 (S/N 813 and up) and not like Fig 11 (S/N 113-812).  Am
I correct to understand that the orifice in my plane's MLG is the right
one and does not need to be modified to implement the 1320 pound STC?
Eliacim