That "'set' them up" is an important step(s) that cannot be overlooked.
Apparently you did not know that injector rebuilding (nozzle replacement) entails more than simply R/R the nozzles and a visual that they are centered. That is just the first step.
The injectors need to be calibrated. Requires a POP tester and shim kit.
1. Set to correct POP pressure
2. Good spray pattern
3. No leaking, dripping, peeing, as pressure is slowly raised to POP
4. Balanced POP between all injectors to a small percentage of variance
Requires extreme cleanliness workspace.
This is an iterative process. GUARANTEED you will not achieve at least #1 and 4, probably 3, with a simple nozzle R/R. GUARANTEED the POP will vary wildly as the new nozzle dimensions are different enough than the old ones to easily affect the POP. Even simply disassembling and reassembling an injector without changing anything can result in a different POP.
Even if you marked which original nozzles were in which housings and put them back together that way, you won't get the correct POP.
My advice:
Get a POP tester and shim kit, learn how to use it, and spend the day calibrating and balancing the injectors.
Or have a reliable shop calibrate them.
A set of correctly balanced and calibrated injectors can really bring these engines to life.