On a regular Revox, you also need to change the reel hubs, unless they already have the two additional holes and longer grip to fix the platters. <http://cgi.ebay.com/_W0QQitemZ7542206030> <http://i5.ebayimg.com/01/i/04/d3/bd/16_3.JPG>
This store sells a lot of Studer and Revox gear: <http://stores.ebay.com/filmco>