Well here's what my car looks like complete with small plates...
Here's mine 6 digit plate, plate cut to the exact size of the mounting and numbers slightly reduced to suit...and it went through the test.
I think the change in font size is so subtle ( and it's the standard script) he didn't notice! I'll dig out the dimensions from the invoice and report back!How much did you trim off top/bottom/sides, is the plate actually legal, or did the tester just not notice it..??