I've been getting a lot of upper gastronemic (calve) cramps after long rides. Mainly my left. Seems I can't get this new build dialed in. Tried moving the saddle back as well, and lowered my seat. Maybe I have to lower it more?

Anyone have the most useful link for proper saddle height? Followed sheldon brown's article, but seems as if I'm doing something wrong. My calf feels like it wants to explode after a long ride and cramps up uncomfortably for a few hours after my ride.