I agree with Brad
Chris: I agree with Brad, about the weights and the moments. A few summers ago, we also had to replace our anchor light. We just lowered the mast with the boat in our slip. It wasn't a big deal at all. I think we did use the same wooden crutches that plug into the gudgeons that we use to raise and lower the mast on land. Make sure you use the main sheet's blocks attached to the forestay to give you plenty of mechanical advantage, and it will be easy. I had pulled my wife up to the spreaders years ago, using about a 20 foot piece of webbing to make a seat, but that was about far enough, the boat did rock a lot with her at that height. Aldo