Frag Racks that won't scratch glass

[Adamantium]

Hi all, I used a frag rack for a while that was basically just acrylic right up to the glass on the inside of the tank. As a result, several months later when I took it off, there was a scratch in the glass. Even though it's minor, I'm pretty devastated. Can anyone recommend a frag rack that uses, say, a silicone or rubber piece on the inside between the rack and the glass?

Thanks!

 

[fcmatt]

Even with rubber and silicone touching the glass won't sand just get in there anyway? And then with regular maintenance and water flow moving it gently give you the same result?

 

[Adamantium]

Even with rubber and silicone touching the glass won't sand just get in there anyway? And then with regular maintenance and water flow moving it gently give you the same result?

Possibly, but I haven't had this issue at all with my shroom box which has silicone inserts that sit between the magnets and the glass.