I replaced all these hoses about 6 years ago. It was expensive and a nasty, PITA job. Now, the "fuel grade" hoses I paid so much for are rotted again. Is it unreasonable to expect them to last longer? I'm starting to think it's all the wacky bends in these that makes them wear out so quick.
PLUS, I've got the weird Trailblazer aux. tank setup where the rear tank feeds the front (stock) tank. I think this causes fuel to sit in some of these hoses a lot of the time, where normally fuel just flows through temporarily.
I've search through many posts here, and keep finding suggestions about getting a muffler shop to bend a piece of steel pipe to replace some of these sections. I can't tell if these suggestions are actually aimed at those with fuel INLET pipe problems. Could this work for my hoses as well? My fuel inlet section is fine, it's just the 1" and 3/4" sections that connect everything together underneath. I guess the 3/4" stuff is just for venting?
Thanks for any help/opinions.

this is the 1" section that connects the aux. Trailblazer tank to the middle tank.

this is the filler hose for the rear tank.