Hi, Recently I have been suffering back pains. I do not know if it is the stem I am using, which is a Monty 221 ti carbon effect one on a Zoo! python frame. As the monty stem is quite long and low, I was just wondering if anybody else has suffered this before, or is it just me? Do I need to get a higher stem for example. The Echo team one, or one of the onza ones,as these are a bit higher. If anybody is riding a Zoo! python short frame on here, and has a stem they recomend please will you let me know. As I do not want to be going spending £35-£40 on a new stem and it will not make much of a difference, it is a waste of money. Also if I get a lower stem will it make my side hopping a touch bettter? This is one of my weak things in trials. Help is appreciated. Thanks Ross.