Leaking bulkead solution?

[Dreadful]

i may yet have to.. i found another silly noob mistake i've made.

when i had the glass pieces cut they came with little tiny cork squares to keep them from scratching or banging into eachother. i decided it was a good idea to place these at the base of the tank between the glass and tile to help as some sort of cushion..

i am now 100% certain this is the reason for my bulkhead leak.

as i continued filling the overflow box this morning small leaks started again. im guessing because these little cork things compressed as more weight was added. as i tightened the bulkheads more the leaking stopped but i eventually reached a point where the tiniest leak cant be fixed!

im so frustrated because im so close! i just feel like taking a sledge hammer to it right now!