I am still thinking the 6 x 8 Mirrors similar to a Big Rig will work too but I am worried about too much vibrations,, we will see !
Keep us posted !

This is a friend's garden where they plant melons in the strips.
I'm an old farm boy so take pride in making the rows as straight as possible. Think OCD.
I mounted the CMP Attachments 3PT tine harrow to help settle the soil behind the tiller. Seems to work fairly well in spite of the bindweed.
Update: Put on my 55 gal PTO sprayer and sprayed 10 acres in the last 2 days. The vibrations on the mirrors were minimal. I was running at 1600 rpm and barely noticed the vibration, and it certainly did not affect my visibility. Had one mirror on the last 2 spray nozzles on each side. Worked like a charm. No need to crank my neck around to the rear all the time.
My logic says the bigger the mirror and support structure holding it, the larger the vibration...
FWIW...
Update: Put on my 55 gal PTO sprayer and sprayed 10 acres in the last 2 days. The vibrations on the mirrors were minimal. I was running at 1600 rpm and barely noticed the vibration, and it certainly did not affect my visibility. Had one mirror on the last 2 spray nozzles on each side. Worked like a charm. No need to crank my neck around to the rear all the time.
My logic says the bigger the mirror and support structure holding it, the larger the vibration...
FWIW...
Nice mirrors! Can you post the Ebay link? Thanks.
8 loads of pit run/clay mix yesterday and rough spread the loads in front of the barn [ whilst it was still windy enough to keep the mosquitoes away/not raining ]
Wondering... Clay, doesn't that get muddy fast when wet, and slippery ?
Out here in SoCal, any portion of the dirt road with clay gets like an ice rink when it rains for a while.
We end up digging it out and putting in a mix of Decomposed Granite and 3/4 minus stone, sometimes we use crushed cement too.
Funny how that works out !
The gravel clay mix forms a base for the crushed limestone [ we call it Afton stone up here ]. You level [ and crown ] the gravel/clay layer and pack it down some, then cover with the Afton. Any clay that does not get mixed real well with the gravel oozes up and mixes with the Afton. Once the whole shebang dries the gravel clay hardens and the Afton layer also hardens. The layer of Afton does not let any water get down into the clay mix. If you try to dig it up after that it is like digging blacktop and it comes up in slabs like blacktop. Scratching at the clay/gravel with a backhoe is a chore. You might get a little sponginess in the Spring as the frost goes out, and this is a good time to work it with a land plane if you need to. But it generally does not develop pot holes in a light driveway use.