Okay, I'm intrigued now. I have an indestructible Russian 5" reflector (down, Roger) which I enjoy greatly, but it was pretty obvious before I got it (for a fiver, at a parish sale!) that light pollution round my house would make anything but moon-watching a complete no-no (meaning I mainly use it when I'm camping or visiting folk in the sticks - and I live right at the edge of the mountains, on the extreme edge of the city suburbs). Surely it was clear before you bought a scope that light pollution was going to be an issue, or has it got worse over time?
Also, wouldn't it have to be a very big trapdoor to get any kind of a field of view?