I disassembled the Mylar speaker in the Cleartone 281 speaker and installed it within the 961 PS and it worked very well and fit without any modifications. 73, David, W4DES -- FAQ on WWW: http://www.contesting.com/FAQ/tentec Submissions: tentec@contesting.com Administrative requests: tentec-REQUEST@contesting.com Problems: owner-tentec@contesting.com