Quoted from zahner:
Mine came with the shaker, art blades, and magic glass. As I recall, I was charged an additional $300 for the three items, there were no additional charges for installation. I’ve heard that installing the art blades is pretty difficult, so I was happy to have them do it.
All in all I’m very happy with the purchase. Game looks awesome - especially with the cupholder
I highly encourage you to buy or make a set of art blade protectors BEFORE you lift the playfield the first time. The playfield is very tight to the sides on Houdini and the metal piece at the end of the wireform that drops the ball in the lower catapult (trunk launch) is kinda pointy and can easily scrape or tear those blades. Pinball Life and possibly others sell them, it seems like a lot for what they are but cheap insurance to prevent a hard to repair / remedy accident. If you have or acquire other games with blades they can easily be used to protect those too when you have to lift the playfield.
My thanks to the others that pointed out this need to me before I installed mine!