Originally Posted by sailingfool
Ditto to Steve's comments, and additionally you don't want to try to resolve this situation by adding a topping lift. If you were to do so, you would be putting an risky load on the boom, if you trim the main hard with a tight topping lift, you could easily break the boom (been there, done that...).
I agree with both you guys. But I assumed the OP was saying he had this problem when he's not sailing, i.e. when the main is flaked and he snugs the sheet to keep the boom from swinging back and forth? Maybe not...
Even if I had a boom kicker, I'd still want the topping lift. If you're seriously into racing and don't want the topping lift flailing around while sailing, you can design it to be quick release at the boom end and bring it forward to the mast when sailing...