Number plate X-te

Moin! I’ve admitted my new US-Oldie today ,and of course,despite registration of the TüV (mark max. 270×180) Palaver because of the size. 270×180 is fortunately also entered in the new papers! “LKR-marks are not possible, should we not bla,bla,bla…” ! Now I have 280×200,okay,had been able to get worse , but nevertheless: 1.)I am now with a totally illegal,because bigger license plates are on the way . 2.) Front of course hangs it fully in front of the cooler ! Now my ingenious plan: I Ch drill holes into the sign without end to ensure the air supply ! Does anything speak against it? Possible approval regulations or anything else? How about if I give a self-indication to the police, because of too large a license plate? If the tires are 5 cm too wide as registered as a theater … Greetings