Hi Alf
I replaced both uphaul and downhaul lines on my Baycruiser over the summer, and it turned out much easier than I feared. I did it at the dockside, pulling the stern up the slipway to get the blade off and then later back on. I thought I needed a big drill to remove the old epoxy, but it is easier with a small one. It all drilled out in just a few minutes and the ropes pulled free. I replaced the original ropes with dyneema cored ones. This allowed them to be thinner, and this has reduced friction considerably. I epoxied them into place using 5 minute rapid setting Araldite, and that worked a treat. You have to work fairly quickly, but it is not difficult if you get everything ready before you mix it. The whole job took a lot less than an hour and I went straight back sailing from the dock.
What I would like to know is how on earth do you replace the lines on the centreboard?