hey guess what, i did!!. a certain book i found says the P-61 had enogh major poblems to prevent full production. the fuel system, tail unit and flaps all had to be modified.
"the troubles were all due to the fact that there was so much to go wrong; for example there were 229 design changes...
heres a pic of the wirraway and boomarang together at temora.
IMG_1284-1.jpg - Image - Photobucket - Video and Image Hosting
and a good link
British Aircraft of World War II - COMMONWEALTH BOOMERANG