OK, so there's only four possibilities here:
1) Alignment, and since you apparently can't / won't to try a different method, (perhaps you tried a VE template previously, but as per previous posts, using Conrad Hoffman's arc protractor is not difficult), it looks we'll have to discount that as an option.
2) Tonearm / Turntable setup - VTF/ VTA / anti-skate / azimuth / perfect levelling - and you are certain these are correct, so we can discount these.
3) Tonearm / Turntable problem, which again, given it's a new Technics, I can understand why you'd rather avoid pursuing this possibility.
4) Bad records.
So since options 1,2 and 3 are 'off limits', you're left with 4, which you can't do anything about.
(you'll notice I didn't mention cartridges, because I do agree, on a properly functioning TT, and properly aligned, you should not get IGD with an AT95ML)