I'm contemplating creating a discord for the rat owners/rat people of this thread, but also because I've started perfecting a rat-friendly harness that's easy to use and comfortable for the rat. I would love some users to be my 'lab rats' and give me their pets' dimensions and I send them one to try out and critique. If you're interested in a discord just shoot me a pm and I'll keep track (I'm hoping at least 5 users to get it up and running)