easy way to change headsails?
A lot depends on the boat, it is often easiest to hank on the smaller jib below the genoa and then drop the genoa on a beat then unhanking quickly while still beating. The filled sails will hold the boat on a pretty even heel angle. Another option is to add a downhaul that is tied to the jib halyard, passes through a block at the jib tack fitting and then runs back to the cockpit. You are then able to pull down the jib from the cockpit.
The place that reconditions sails is called a sail loft. If you sail is actually becoming ''thin'' it is shot and there is nothing that can be done with it except replace the thin panels with new cloth and that is so close to the cost of a new sail on a small boat that it rarely makes sense do.