I didn't like the fact that it took about 20 minutes to fold the foldable roll bar(ROPS) down and/or up,because the bolts you need to unscrew are in an awkward place and a very fine thread. So I bought new grade 8 bolts the same size as the originals and ground the threads off so the bolt would fit thru the welded nut, then drilled a 3/16 hole thru the bolt, for a hairpin retainer to hold it in place, with a washer for good measure.
Now it takes maybe 1/2 minute to put the ROPS up or down and the part I ground is not in the part of the bolt that would take stress if (God forbid) the roll bar was needed. I've already found out that a 6 1/2 foot roll bar doesn't fit under a 6 1/4 foot doorway, so I need a way to get the bar up and down quickly, else I'm tempted to leave it down.
simonmeridew