No more knocking. Many Thanks. They fought me, but the machine hadn't beaten me yet. As I said in the title, if you know what you're doing and have everything you need, that's fine. If you are unsure and post it on youtube find someone who knows what they are doing. For us it is quite simple, although sometimes it aggravates the situation. No elevator? Don't have the right tools? Never done? You can hit your kids when you're done. Nobody wants it. Be nice to your kids and let someone who knows what they are doing and have the right things do it.