Image of  FM 18 FM19  FM20  FM21  spades showing full schematic detail
 
 

REAR VIEW ALL SPADES


 
 
 
 
 
 
 
Spade Height
  
FM 19
45 MM
FM18
46 MM
FM21
48 MM
FM 20
43 MM

Somehow the numbers for the vertical dimensions did not translate during the jpeg conversion process. So they are listed in the table above.