Thats superbly done, great finish and nice well used weathering. Yiour right about the Airfix canopy, i just finished the 72nd kit and the open canopy is a major let down. But i didn't have much choice but to use it.
Judging from the yellow tail band and wingtips, i would guess this is from the earkly days of the Russian campaign (the fuselage band and wingtips were not painted for the balkans.