i was going to try to secure then some other way or just hope they didnt fall off but the rods is a good idea. fortunately the pieces of rock that are going on there arent too large and it shoudl be easy. i am going to do these two first and then if i liek it and it seems t obe functioning then i will possibly do a couple more depending on how it looks. i definately dont want everything to look too crowded.