I'm looking to replace my original chain. I plan to replace both front and rear sprockets. Uncertain on gearing I want to run. I've been switching between 14/50 (stock) and 13/50. I can notice a slight torque improvement running 13. Thinking on going to either a 51 or 52T in back to add more torque. I ride different trails. tight stuff, I run 13T. Faster trails, I run 14. I like to have that switching option. Any thoughts on if I would be better off with a 51 or 52 in the back? If I go to a 52, what length chain do I need. Can I use 520/110? Or do I need longer. Any chain recs? Oring or X-ring? Cost is a factor. Finally, how do you cut off the original chain? Do I need a special tool? Never had to do this before. Thanks.