Thanks Graeme,
I'm glad to hear that the verification box has gone for you too now! I wonder if anyone has Carson1934's email address, it would be nice to let him know it's gone, as I recall that it seemed to be what caused him so much grief logging in and to give up playing!!
I had a look at a Blandford painting (God bless you Kenneth Munson) and noticed the very different leading edge,
It looks to me like Blandford may have missed that detail, the side elevation looks right and seems to take into account the non-swept section of L/E, but I've not seen any three-views or photos that show his straight edged version, have you??
Your latest challenge looks like the Dominion Skytrader 800 of 1975 ?