I have damaged the metal mesh on the top or base of my canister.

This is a user replaceable part. If damaged order a new mesh from Avon Underwater Systems, which will arrive with a complete set of plastic rivets to fit it. All original rivets must be removed and discarded along with the damaged mesh. Note. Do not re use any of the rivets.

Further Resources

Assembly & Testing Document

Video Link: Canister Bottom Removal and Replacement
Video Link: Canister Mesh Rivet Replacement