@dondan - More of a curiosity, but would one of AsRock Rack's Deep Micro-ATX boards fit in the A3-mATX?
https://www.asrockrack.com/general/productdetail.asp?Model=ALTRAD8UD2-1L2Q
https://www.asrockrack.com/general/productdetail.asp?Model=SIENAD8UD2-2Q