I've watched the videos and I've got two very good books on firearms disassembly, but it's a learning experience every time for me.
I have an R1 that has little to no slack to the trigger before let off. Nice crisp pull, but if I don't make a point of fully releasing the trigger, two fast aimed shots or a double tap are impossible.
I swapped both the trigger and the three pronged spring from my other R1 and the problem persisted. Still haven't solved it. In the process, I got more experience disassembling and reassembling than I wanted, but now I feel reasonably competent. A few more hundred times and I'll have it down to a science .....
Would I tear down my Series '70 Gold Cup? Not a chance! If it ain't broke .....