Not sure where you are located to not have a hardware store next to you, but they will cut for nothing, you buy a small glass cutter like $4.oo and cut the 45 degrees on corners, pop those off, did that at my desk in my office, then take carbide 300 grit sand paper and smooth all edges and corners not to cut yourself or FEP film, very easy to do..
And as far as 3DM-ABS, so far it work very well with this glass and new drum vat, at the ease of this new vat if I R&D again I’d bet I can cut more than 30% off of all my settings.