The rEvo rebreather comes with a standard weight pouch on the top bracket. Most people put weights up there to help with trim. It can hold up to about 2 x 4lb weights in two pockets.
It generally works pretty well; however, I have found that sometimes a weight will actually fall out and this can really suck. It seems like the velcro system just doesn’t hold the weights in very well.
After having weight mishaps a couple times, I went in search for an alternate solution. I took a standard XS Scuba weight belt that has integrated pockets and just ripped out the pockets and zip-tied them onto the metal bracket at the top. I’ve got probably 100+ hours of diving on the unit and I’ve never had a problem.
Here is a picture of the setup:
As you can probably see, there is a bunch of “red rust” as a result of banging around inside of wrecks and it hasn’t once lost a weight!