We tried a 3D-printed bracket from Eos that joined a Eos receiver to a VM locator . It did work, but depended on a phone maintaining connections to the locator (Bluetooth), Eos Receiver (Bluetooth), RTK Corrections (Cellular), and the Eos Receiver maintaining satellite connections. This was too much setup, and the bluetooth was too finicky. We've gone with the VM RTK-Pro instead to great effect. Field users love that it's all physical buttons, so no need to take off gloves and fuss with touchscreens. We stream points in automatically and have field users add line features separately to indicate where desktop review is needed. The Eos phone support is awesome, but their system is really just three systems in a trench coat. The VM online system is terrible to configure, but a dream to work with in the field.
Good luck,
Robert