custom made speaker stand legtips - rubber or metal - not good vibration

I finally had my preferred speaker stands made but it came with a wooden "stick". as shown on the picture. I wanted to put an rubber tip to the end and to secure it, I put a screw in it. Now the screw is touching the floor. (Speakers: Dynaudio Evoke 20) 

Questions:

• Should I recess the screw so that the "rubber touches the floor?
• Should I put something on the floor between the speaker leg tips and the floor (hardwood floor on concrete) - like a soft pad?
• Entirely a bad idea for both rubber and screw?