Butcherblock Acoustics "feet" effecting sound and isolation

Hello, general question here do you believe the feet being used under a Butcherblock Acoustics platform effects the overall sound? I'm using metal spikes resting on metal decoupling discs that I ordered from Butcherblock instead of the stock rubber feet it came with. I have maple butcherblock under my phono preamp (3 inch), all tube preamp (3inch), and amplifier (1.5 inch). 

Also do you think I could be over isolating with all that? I'm gonna do some experimenting this weekend but just wanted to see if anyone had thoughts or opinions on it. I've read good and bad things about isolation and over doing it. Thanks for any responses!