I personally would suggest you leave well enough alone. It isn't impossible to do what you ask, but is it worth it? We never intend on needing an ROPS, but the one time you do and you have altered it and it fails - is it worth the injury or worse? You essentially have no means to test it either! They invented them and design them the way they do for a reason. I would agree with looking into the OEM and seeing if they make a kit of some sort to lower it's height or otherwise, but doing a garage hack and weld job to get there could someday put you, or someone else's life on the line!