Well, lots of info in this thread, good stuff. I was on a glide site and they seem to have a few systems worked out, the most activity on the site seems to be the external catheters with either a connection to a relief tube or the bags. I also try not to drink too much but in the summer dehydration can become a problem, prostrate enlargement is also a problem even with a little H2O.
Thanks for all the input. The plane I fly noe Rans S-7 seat is more upright and the johnny bags seem to work for me now. When I was flying the SS-7 Kitfox this situation came across my mind laying back in the seat, I like the seat in the Kitfox.