Hey Tony,
Welcome to Camera Labs! Just read your post, and although I have absolutely no practical information regarding product photography, I think your question will be better served if you post it in the
Going Pro? or possibly even the
Off-topic sections of the forum. There are very few Pentax users here, and as a result this particular area sees very little action.
Since your question deals with photography in general, as opposed to specific questions about the K7/Pentax, you won't be breaking any rules posting elsewhere, and you'll be far more likely to garner a response or two in the higher-traffic areas of the forum.
Good luck!
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Nikon D300 / 35mm f1.8 / 300mm f4 / TC-14E II
Pentax K200D / DA 18-55mm / DA 55-300mm
Flickr