those photobucket pics don't show much detail so i look forward to when you can throw them up here.
the only thing i can say at this point is to not use the tin foil, it isn't reflective for shit and, it creates hot spots. if you can, just paint the walls flat white, that'll give you 80 to 90% reflectivity.
anyway, good luck, keep it up and keep us informed

bozo,
peace, love, dope

ps: come check out my imaginary garden