Spikes and hardwood floors.....what to do?


Many speakers have spikes that are thinking "carpet with plywood below it"...fine, but what about those of us with hardwood floors? What have you found to be good solutions? This is for the Acoustic Zen Adagios.
whatjd
what about machined discs? sound anchors, lovan, and adona all sell them. adona has the best prices from what i recall. if you wanna go realy cheap just use pennies under the spikes.
Lovan Footers

or

Audio Points (http://www.audioadvisor.com/prodinfo.asp?number=STAPCD2)
Adona Corp's discs worked for me. I got the bigger one's, still really cheap. A penny might leave an imprint in the floor, especially if you have alot of polyurethane coating.