I have Revel Concerta F12 floor standing speakers (love them). They have rubber feet with a hole in the center to connect spikes. Unfortunately mine came without the spikes. Revel won't send me any or tell me what size to get because I did not buy directly from them. Does anyone know what size spikes fit the F12? I don't mind buying some but I can't figure out what size to get. Any help would be very much appreciated.