The Callaway RAZR X HL irons have a fully integrated undercut cavity system. This cavity in the back of the clubface allowed Callaway engineers to position the centre of gravity specifically for each iron, maximising ball speed throughout the set. The medallion on the back of the clubhead is made of thermoplastic polyurethane and aluminum, and is designed to fine-tune the sound and feel of the RAZR X HL iron.
The CRC conversion is definitely more than just bolting a few panels along with stock C5 or C corvette.
The usual method of input to your system was magnetic tape, but entry could also be gained from punched cards through credit card reader or from the operator's console, if special instructions were required. The W8 was very expensive for it's time, with prices around $500,000.