I am late to the party, and glad you found a good solution, but I wanted to add two comments:
- When you said edge grinder, I am assuming angle grinder and you can purchase cut-off wheels that are meant for cutting sheet and plate steel. I use them as my primary metal cutting tool in my little shop. Wear eye protection and a face shield, I haven’t seen it happen but they can shatter with shrapnel flying everywhere.
- Related to LSLGuy’s comment about butchering the cut: after cutting sheet/any metal you can angle grind, file, sand and clean up pretty much any cut out there. Always assume that there will be deburring, cleaning, and finishing required for any cut you make. Especially with a free hand tool like an angle grinder with cut off wheel.