MD and SR do both ride on coil springs but the SR setup can not be set nearly as light nor is the float mechanism as stiction free and of course an SR has no flex, even a 42’ is one piece.Is MacDon about the only major mfg with a suspended mount framework? I guess maybe Shelborne does as well on some stripper headers?
I like springs but they lack control and adjustability on the go. IMO, if a mfg can make something similar to what MacDon has, use the springs for 75% of the header lift, and then use smaller hydraulics for the remaining precision control, it would be much better.
Also, IMO, MD makes a great header but it lacks eye appeal for cleanliness.
The new Deere headers are entirely hydraulic suspended.
We do not operate in the same conditions but I have never had any desire to change from free floating coil spring suspension.
I have however thought flex at all cutting heights capabilities and we are very close to that.
I run with float mechanism covers off as I just like to watch it work.
Function over cosmetics wins every time for me!