Yes very important to take time for training before hollidays
I have since 2 year the "old" Retra Pro with Powervault --> 8 AA x 2 😞 That's the reason I ordered the new one with only 2 Lithium bat in each strobe
I had in 2023 a trip with problem with my trigger ( salt water on the pcb --> trigger batterie empty after 30 to 60 minutes... very frustrating I needed to replace the trigger.
It's a Isotta trigger in a Isotta housing. I replaced it by Isotta and buy a new one to be able to replace it in case of the same problem appear an other time
No EWNL ( it's realy to expensive, and probably not compatible with Isotta)