Thanks everyone, I rode yesterday and was fine actually going home, it wasn't as painful as when I bonked, because I used to not eat anything before the ride, thinking it would help to lose weight.
I'll be doing 35 tomorrow, 50 if things feel ok
Just because I do analyze things.. what would be better. Doing a 50 mile ride twice a week, or doing 25 miles 5 days a week? Is more repetition better? Or is the time in the saddle at longer duration better?
I think I might try the different cassette to make things a little easier on myself.