if you go to www.graflex.org you will find an article on the Graflex XL that I wrote many moons ago --http://www.graflex.org/articles/XL.html
great camera all in all -- i took my to the grand canyon a year ago and got some nice stuff of hazy canyons. It is a camera I need to spend a lot more time learning how to get good performance from, because it is vastly more camera than I am photographer.
don't sweat the tabs on the focusing ring -- as long as you give the camera a modicum of care you're good. Follow the advice about how to loosen up the focus ring -- i sanded mine down a bit too.
I sprung for the 56 mm wide angle lens they made for that -- the grandagon -- massively wonderful lens. I use a 25mm finder from my 35mm camera outfit with that, also have a ground glass back.