I'm glad I could help you out.
For that hookah, if you get Nammor/Razan hoses or the likes (wide gauge or plastic tips, or both), you should ditch the silicon grommets and go for some plastic ones, available on H-S.com and various other sites. If you are keeping the normal Mya hoses, the silicone ones will be fine. The problem with the silicone grommets is that after a session or during a session, as smoke is pulled through them, glycerin residue (what comprises the smoke for the most part) makes them slippery and causes sealing issues. Wide gauge heavier hoses with wider tips will be almost impossible to keep in the ports.
Make sure to check the discount section as well (in the vendor section of the forum).