Remember way back when? For a couple rounds we did both 10.5" and 7", and even at the same time, I believe. I lost a 10.5" but not the end of the world. Newbies be aware that historically with a 2 week listen time and a week to 10 days shipping with some allowance for late shipping, and 10-12 people in a round, the whole thing takes about a year to complete (go full circle and get your tape back). Didn't at the end there we all agreed to send by PO priority? I think we sped it up somehow.
I always thought it might be more interesting if the tapes were full recordings of unique releases we have. The mix tapes were nice, but rarely did you (I) get something I didn't already have on some media or another.
All in all, it was a gas. Lots of very well recorded tapes, too.