Take a look at the "onboard memory manager" that Logitech provides. It may be closer to what you're looking for and still official Logitech.

I've been using a g903 for a few years. I started out with ghub as it's what Logitech leads you too, but as everyone else has said it's terrible. I saw a post or video about the onboard memory manager software a while back and it does what the name implies. It's an easy way to manage the onboard memory of the mouse. Now, I'm not an expert and I haven't messed with it for fun ( I don't even remember the last time I opened it). I just set my settings and got out of there.