If you've messed around with it then you still need to time it. But since the 3way is fixed you need to slightly modify the timing steps by timing the variable firing point to suit the fixed cocking point.
The other stuff like the back block gap and setting the LPR to get the right amount of travel is all the same. If you mess with the stock LPR make sure you take note of where the internal adjustment is and set it back after rebuilding.
This assumes that you did something major like swapping trigger frames or rebuilding major components that required totally taking apart the whole gun.
I just thought I'd take a quick peek and then the world went all yellow.....