I have a nice example of X-300, and I am about to archive some old 1/4 inch half track records. I can play the tapes with the quarter track version too, however I think the quality will be better with the half track, and the information on the tapes ise unique. As far as I know, there is no half track version of the X-3 and 300, thus I cant buy a second head stack. Does anyone have some suggestions what other heads are good to try (with certain mechanical conversion) and put on a spare head assembly and use it for the purpose? I just had a look at the service guides of Tascam 32-2 and Teac X-300, and it seems to me that although head assembly layouts are different, the mounting holes look like identical, suggesting that I can put that head on the X-300 head assembly.. Can anyone confirm that? It might resolve my problem..