hi, just wondering if anyone has replaced the seals in their kraken clones? i ordered 3 extra glass tubes with mine because i saw a review and the dude had chipped his glass trying to get it off. however, only one of the 4 pieces of glass actually makes a seal and it still leaks a bit and slides off if you look at it funny. the metal sleeve also comes off a little bit too easily for my liking and would benefit from an o-ring in the groove right at the bottom under the glass. does anyone know the sizes of the o-rings or any good places to look?