I have an on and off project making a wing mower to attach to the Toro Z400 52" ZTR used to mow a neighbors big lawn. What I have is the front half of a Snapper commercial 36" walk behind that was unbolted from the drive chassis. I added 2 more casters to the rear of the frame that supports the mower deck. The wing mower will have its own engine. The Toro mower deck sticks out about 4-5" to the left of the left rear drive tire. I took pictures of the wing mower placed in several spots to the left and partially rearward of the Toro ZTR. I"m not sure which placement I will decide on. How many inches of overlap do you think I need?