I have a samsung SFD-321D HDFD IN A FALCON 030 which seems a bit flaky at times. I want to replace with TEAC FD235F, SAFRONIC DS-34A, SONY MFD 17W-ED,SONY MP520-1 or TEAC FD-235HF is there some info on net as to jumper settings I am interested in 1.44mb and 720kb some of these drives vary from not working at all to either reading HD or reading DD but not both. Thankx