I save the gels for a sportive or similar they have more effect IMO that way when I want that extra bit. I usually like to have one about the last 10miles 10% to give me that extra bit (even if its just pychological); on Saturdays 100miler I also had one around half way; and it was similar for the 160mile TofF.
Hartleys Jelly, cut into cubes put in a bag 3 for a pound
