At this point.. I believe you have an electro loader... and now you have a tank too... so I'd say the pops and perhaps a barrel would be nice... but none of that is essential and you can keep pace with everyone else using what you have now too!
Pro tip for the tank.. if you don't have a cover for it, get some muscle tape / hockey tape, and put a cross over the bottom of the bottle to stop it sliding on your shoulder.
Pro tip for the tank.. if you don't have a cover for it, get some muscle tape / hockey tape, and put a cross over the bottom of the bottle to stop it sliding on your shoulder.