I know those will be a basic question, but, what is the best way to install them? I have had a couple lately where ones the trap is on and tested, it leaked. And then I couldn't get my hand in to tighten up and it just ended up being a nightmare. Having to undo screws in basin a little and tilt it up to pull pedestal out. Also when removing traps for blockages. What's the best way. You can't test them before putting them in. Is it a silly question? I have only installed 2 in my time. Mostly people are going for wall hung these days or vanity units.