I got my PM 2 months ago, I started using the 8 cms rods, at first, the spring was at the second mark, at the end of two months i was at the fourth mark, so i decided

to add the 2 cms rods (I did it today)and the spring is now between the first and second mark, I have seen my penis grow a few millimeters,

but I donīt know if it is rigth to add them now or i just have to wait till the spring hits the fifth mark.
One more question, one of the glans holders that came with my pm just broke, I have another two, but yet i want to be preppared for the moment when all of them are too worn out or broken, and since I live in Mexico mail takes a few weeks to deliver from the US, most that anyother matter the question is, will they charge for the new ones I ask for?