I primarily use my bike for desert and enduro riding. And lately I've been getting more into the technical single track trails where there's more basketball sized rocks than dirt. I've had enough of stalling on rocky rutted uphill climbs and I think I want to add a little weight on the flywheel. I've heard it's a simple job but how much weight do you typically add and what are the best vendors to get the weights from? I'm not an expert rider or anything but I don't want to give up much throttle response off the botom by over-weighting.