Al - I have had them with 7 and with 9 but never lucky enough to get the dual headed one... yea... well worth putting online. do you have a link to any sales info on this? I used to hear of these but never laid eyes on one. Ed# In a message dated 9/22/2016 10:32:09 A.M. US Mountain Standard Time, aek at bitsavers.org writes: I'm trying to decide if I want to attempt getting my 7970 with a dual 7/9 track head running this year.