[Saphire]

Not yet Don, I am still searching for a bowl, but I am following what you are doing to see if I can come up with some way of lighting up the bottom half of the reflector. I picked a roll of aluminum tape from the £1 shop I may use that instead of tinfoil. its very shiny but will give that ago.
To make the equivalent of a stofen diffuser you could use a plastic milk bottle and cut it to shape its roughly about the same density.