Apple Offering $700 Kit to Add Wheels to the Mac Pro

Apple today introduced a Mac Pro Wheels kit designed for the Mac Pro, which adds wheels to the machine after purchase. The kit is priced at $699.
When adding wheels to the ‌Mac Pro‌ when making an initial purchase, Apple charges $400, but the standalone kit to be used after purchase is $300 more because the pre-purchase price includes the price of removing the $300 feet.
Apple says the kit includes a 1/4-inch to 4mm hex bit for installing the wheels, but additional tools are necessary.