Putting a wood guide (popscicle sticks...) works just as well, but requires you to either buy or make the guide.
we use the same jumbo craft sticks for honey tasting that we use for comb guides (in grooved top bars, btw). if anyone wants comb guides, is willing to wash them themselves, and willing to pay shipping or pick them up in leominster, you are welcome to them...literally by the thousands.
we will also make them available for anyone coming to the 2010 Northeast Treatment Free Beekeeping Conference (dates tbd, but same venue).
deknow