Hi Folks, I bought a sheaffer snorkel from ebay. It has all the snorkel parts alright. I bought a repair kit, and I replaced the sac and the o-ring. I also replaced the seal that comes in the nib section. yet, the pen does not suck ink. I followed the advice in another post here and tested the barrel by submerging in water; I found that the end of barrel has a macro crack. So, I went on and used a tap to seal the crack just for testing purposes. Then, I found the blind cap also has air leak. I found a plastic glue in the hardware store to fix the crack. My problem now is how to fix the blind cap leak. I disassembled the blind cap and it has a rubber that does not seem to be bad. Is there a way to fix the blind cap seal? maybe by applying adhesive or replacing it with any rubber piece. and how? Thanks.