Picture of a couple of mods I've made. The 1oz tin is a very straightforward 510 box mod with push button switch and is powered by a set of 4 aaa batteries, which gives it an output of around 4.5v. The lid is also cut back to make room for my AGA-t, which admittedly is not used very often. I then made the 2oz tin with a little extra thought in mind - I had nowhere to store e-liquids etc when out and about and the tin has accommodated a 10ml bottle extremely well, there is also a cartomizer rack on the lid which when placed correctly sits over the top of the battery bay - extremely useful for a backup. There is also a chock which allows the mod to be used as a pass through, providing the batteries are removed. The battery bay is also held down with industrial Velcro so if replacements are needed it can easily be removed.