Silicone cover for E3D V6 hotend improved and reinforced

This is a remix of Srek's silicone cover mold for the E3D V6 hotend. I really like Srek's mold because you neither need a syringe nor screws and the hotend can stay in place. Thank you very much for your files!

What I didn't like was the fact that I had trouble removing the cast from the original mold. I didn't like the idea to have to destroy parts every time I want a new silicone cover. That's why I came up with this version.

Print with a resolution of 0.2mm or better and an infill of 50