Moving from Carpet to Hardwood floors...need help

Next month I am moving and the new room will have hardwood floors. My speakers greatly benefit from using their spikes to couple to the floor...any suggestions how to couple to the hardwood floor without spiking into the wood? My two thoughts are to use either brass disks underneith the spikes (or similar) or to head in the direction of Blue Tac without the spikes.

Spiking into the floor will not be an option!

Thanks in advance