The design of the MM-1100/MM-1200 head assembly involves over 90 degrees of total tape wrap over fixed guides. This is a source of flutter, which is only partially alleviated by the small flutter roller between the record and repro heads. Until recently, the only solution was to disassemble and drill the head block to accept modified guides taken from a donor tape machine. With our purpose-made rolling tape guides, replacement of the fixed guides is literally a 10 minute operation.