I think the M365 is a great choice and the ride quality really isn’t bad at all, because of the air filled tires. I’m not a fan of doing major modifications, especially to smaller scooters. I have heard that it can affect the stability of the front end to have so much weight up there.
If you buy an M365 and ride if for 6 months, and then sell it, you should still be able to get most of your money back, and then you can upgrade to something that’s designed to have suspension.
If you spend a bunch of time and money changing the suspension, you’re really unlikely to get that money back when you sell.
-Paul from ESG