Installing CushCore is easy, until it isn't. This was my 6th? go at it. Most were easy, two of them damn near drove me mad. A new MagicMary SuperG on WTB i29 rim sucks. The new tire is waxy and stiff, and getting it started on the second bead is the hard part, just wanted to pop back fully open whenever I started to put the bead inside the rim. A third hand would have made it super easy.
Getting the old, properly fermented tire off, that lever would really help. I about poked a hole through my hand pushing so hard on a little tiny plastic lever. Beads were basically superglued on after the DH wheelset sat in my garage all winter.
I need that lever, and wearing leather gloves really helped grip the waxy new tire. Weird how slick it was on bare hands.