[RP-502s - screw to stand ?]

You can't see it on the picture clearly, but there are actually 2 hollow pipes, a big one and a small one. The big one is where the cable runs through. Sand won't be a good idea there because it has a hole in the bottom - for the cable. But I was thinking to fill them with pebbles (small stones). 

 

 

 

 

[RP-502s - screw to stand ?]

thanks! I've turned them (was still busy setting them up), maybe I'll leave them not screwed to the stand.

[RP-502s - screw to stand ?]

Hello, 

 

I've got a pair of RP-502S, each on a speaker stand. Now I'm thinking of screwing them to the stand for that extra secure feeling that they won't tip off. The stands have holes in the top-plate so it's possible to insert 2 screws from below. 

 

But, is that considered good practice ? If so, until how many millimeters is it save to drill a hole for the screw ? Any help is greatly appreciated, thanks.