Congrats!

Nothing more to add there, i also have this camera and GSW690III, both giving me amazing results over my Hasselblad 501CM. I love my RZ regardless of the weight, once i went out to shoot 5 different films at using only RZ on tripod and one lens only, came back with awesome results except one roll, just my tips will be to understand the functions of your camera and to load correct and carefully, unloading also carefully, expose film properly, keep the camera clean, and you will be doing fine for long time, the only issue i hate about RZ rather than weight is about using batteries, i can't tell when the battery will suddenly die/run out of power, making me to wish getting RB instead.