Need help choosing generator(s)

supergen extended run system

round thing in the middle with hoses is the vacuum operated fuel pump
mounted with rubber strap to protect from engine vibration

there is nipple mounted top rear of generator for connecting the aux tank,

my generator is on slide/tray in forward compartment
to use aux tank i have to set it on a table level with generator
so i have only used it a couple of times
would work great with generator on the ground or in the bed of a PU truck, doesn't have the fuel lift to work consistently with MY SETUP with tank on ground and genny above it on the slide
works well when both items are same level

the Yellow Hose is the 'oil drain' for changing oil