If you're plowing with a foot control, you won't be able to take your foot off and stay at a constant speed...you'll constantly have to change speed to match changing ground conditions. If you're at a plow day, you'll be changing speed a lot...trust me. The purpose of the brake pedal isn't to return it to neutral all the time....it's more of an Oh-s***-gotta-stop-RIGHT-NOW pedal.
With no spring, you'll have to bump the reverse part a bit to slow it down...bump the forward part a bit to speed it up...to me it'd just make a lot more sense to just keep your foot on it.
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