Bought an Ego-T which was a fail, with the tank b.s.- so I went and bought some Blu carts and some Green Smart Living carts to tide me over while I order some fillable 510's. I'm curious about the Green Smart Living Carts. The thread definitely looks and acts like a 510 thread, but the box is marked s808. I also use V2's so I thought I was clear about the difference between 510's and 808's. Aside from the horrible flavor needing to be slung out and refilled is there any reason not to use the Green Smart Living? I just want to make sure s808 is not some secret code for "looks and acts like a 510 but is waiting to blow up your new Ego". They vape just fine if you can overlook their taste. Anyone in the know on this?