One thing I might note:
When you removed the rocker arms all the good hydraulic lifters fully extended. When you replaced them they usually don't reced automatically. This is where the lifter tool comes in handy by showing the extention of the ball socket.
I have reassembled the rockers and the car wouldn't even start due to this occurance. WE now automatically verify each ball position after disassembly. We have even built a lever tool to drive the installed lifters down (the spring pushes them back with oil reinforcing the position when disassembled)
Bosch Master, ASE Master, L1
33 years MB technician