What diameter are carbon booms i have some tube kicking about inside diameter is 58mm would this be beefy enough wall thickness is 1.8mm
58mm is way too small diameter I'm afraid, if you think of the loads involved from the kicker,mainsheet,clew/outhaul etc when sailing, a boom has a lot of stress on it.
If you're after a carbon boom I've got a superspars one going spare (no issues with it structurally, have a Chipstow one instead). No idea what it's worth but it'd be better on a boat than in my garage. Drop me an email if you're interested.