mfd

For those that like to try and fix stuff, I have an Avidyne MFD I bought off eBay a while back, worked fine up until about a year ago, screen photos below. Fan is also noisy (humms louder than a regular one), probably out of balance, likely from the piece of plastic that is loose inside the...

Is it worthwhile putting in a used g500 mfd/pfd. i would buy a g3x but it isnt available until late in the year and i have appointment now for a 750 i ordered in february. i just wanted to get feedback on getting a used g500 instead of going with 2 g5s instead? thanks