"6 weeks for the AUS? I just had 6 weeks for the prostatectomy. No radiation. Yet.
How is mobility during that 6 weeks?"

For me mobility wasn't a problem; however, I was restricted no not lifting over 10 Lbs.

"Is the pad just for backup? I thought the balloon would squeeze the urethra tightly closed.
A bit scared of the pump in the scrotum. What if you squeeze the wrong bulge?....."

I'm not sure how the cuffs work. Could they be different sizes that are easy to get wrong? In my case there is no problem in selecting the right bulge Hormones have taken care of that issue:)

Of possible interest. I asked my Uro about bike riding with an AUS. She said no problem.