I replaced a tweeter and a bass unit on a B1. The bass unit is a PITA. The tweeter, however is very simple and the G2 looks to be the same design. Vivid sent an instruction sheet with the drivers. A tensioning screw just unscrews from the back and then the driver can be slid out the front. The long loading tube unscrews and is transferred to the new driver unit. There is also an o-ring that needs to be transferred. The wiring is a clip that can easily be separated and put back together by hand.
You just have to be very careful not to touch the driver cone. You should also cover the other drivers. I didn't, and when I pulled the tweeter out, some wires sprung out, and I thought for sure they had damaged the unit below- luckily they didn't. Vivid should design some plastic pieces that fit over the crossbars for protection. I would do all this sober and with a friend that has steady hands.
In my case, Vivid ended up replacing my pair, that had a few other problems as well, with an immaculate new pair.
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