I have switch things up and got rid of some stuff and added others... for the life of me, I cannot remember how to add/remove a piece of equipment that shows under my avatar...  HELPS!!

I think the only way they appear is when you activate the device for the first time,  second hand or refurbished items do appear.

You need to use the same email to activate the equipment as the one that you are using right now on your forum account in order for the equipment to show up under your avatar. For removing, I think there is no way to do that, maybe a moderator could help you with that