My new to me 1209 is getting a new bar and hold downs/wear plates, but I am not 100% sure where they are supposed to go. Some of what was done on this previously looked slapped together to make work and some were missing. Is there a particular spacing on where to place them? All but 3 guards are good, only needed the three new ones, and the plates are good, ordered new, but they are back ordered. Have a new sickle bar too. I had to remove everything in order to get the old worn out bar out. Neither manual I have for the mower has information on the layout, just the number of each item.