Potential increase in length/girth over 12 or so months

[brisy41]

For those people that achieved an increase in size over the first 12-14 months of cycling, is this because you inflated once or twice a day until you could feel stretching/pain. Or is it sufficient to just inflate until it's hard to pump any more. I'm trying to determine how important the pain is to any increase is length/girth. Cheers