No, I just drilled a hole from the bottom up without taking anything apart. I probably could have made it look neater but it works ok.
The lagging is just string. It's glued at the end and then wound tightly around the pipe before being glued at the other end. It's easier to remove the pipes to do some of them but they can be done in situ. I've done it on mine, not as neat aas on the others but it looks ok.