According to our friends at SIG you can cut most of the phenolic tube away. It's primary purpose is a bushing for the tube not to provide strength for the fuse. I used a sanding drum on my Dremel and removed the leading 120 degrees of the tube leaving 1/8" in front of the servo tray for support. Approximately 1/4" was left exposed on the inside of the fuse sides. Much easier to access stuff packed into the forward compartment including the tank.

Remember to wrap whatever tank you choose using reinforced directional packing tape to provide for a rear-facing pull tab.

TTFN,