At the mo I have a 65mm stem linked to a breakout + fork. contemplating either a 50mm stem or 70mm Diabolous. At the moment dont do any DH races, but I do like ripping downhill when I do on my gemini. What would be the difference in feel with the diferent stems? and because I use it for everything even climbing would the 70mm be suffice. PS it's a small frame and I'm 5'6"