I got my Grid through Summit and for now can do everything I need with just the 7720 & 7730, program it with the laptop so don't need any added piggyback acc. Got mine through Summit with racer discount, 10% off and $50 back special gift card from MSD I was at $653.

I will also add I am running the Grid with my MSD Pro Power coil as the MSD tech said it would be fine and I didn't need to buy the specific one that MSD called out for the grid, this is just a FWIW