What Jeff said is exactly what a service call would be. Just close the high side valve and hold the contactor in while watching the low side gauge and when all the refrigerant is back in the condenser close the suction valve and then release the contactor. Rebraze and open the valves back up (after the usual line purging).
It's recommended to replace the desiccant filter but on a system that's not open its not worth it.
Also check your nut fitting on the txv they are known to leak as well. I really hope the replacement for 410a is a lower operating pressure gas as leaking evap coils are still a very common problem. Thin tubes and high pressures especially in heat pump mode are a recipe for leaks.
I still prefer the old refrigerants for practicality and imo less of an impact on the environment but... Still have r12 for automotive but used my last r22 in the house unit this year.
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