I have a Nagra IV-S machine which I used to transfer quite a few 2 track tapes to digital. However, the utility of the machine as a transfer and home audio deck would be magnified a thousand fold if I was able to play 1/4 track tapes on it, of which I have A LOT, as well as 2 track. As a safe transport for old delicate tapes it has no equal. I was thinking that maybe a 1/4 playback head could be installed where the pilotone head is, and could be switched in and out of the playback amp. Has anyone ever heard of such a conversion? Has anyone here ever converted a Nagra into a 1/4 track machine? Or know anyone who could do such a thing? Has anyone here ever SEEN a 1/4 track conversion on a Nagra? Any thoughts on the subject would be so welcome!