what is the best way to add weight to my DM without affecting the balance and is removable??
Why would you want to do that?
Just to answer your question though.
All you have to do is go to an autoparts store and ask to see their large o-ring kit. Then proceed to try them out till you find the right fit. You will have to take the caps out and probably leave them out though.
O-rings are the easiest. Go the the hardware store and try out the o-rings until you get the right size. Then get 2 or 4 of them. No need to buy a whole o-ring kit. Just saying.
in reply to why would i want to add weight to my DM, i just want to see what affect it would have on the feel and play, thats i wanted to know a non permenant option for additional wieght, abd thnx for the suggestions of o rings i should be able to get some from work that will fit nicely