The strips of 40# roofing felt was a genius idea!
I wanted something that would not promote moisture against the tank and to pad the tank from the supports. I store the generator indoors but the felt seemed like just the trick and it was already on hand!
I got around to finishing the aux tank today and filled it up. Yesterday I painted everything to match and stenciled the tank and now it almost looks factory I think. I used the rust oleum sand rattle can paint. It does not match perfectly but it is close enough for me. Plus the old paint seems to be faded. The rust oleum certainly does not hold up like the carc does but at least it is easy to touch up.
I definitely cannot lift the front of the trailer anymore but it does still roll around fine and the wheel I put on the front seems to be handling the weight. I have about 45 gallons of fuel in the aux tank plus another 9 in the main tank. I also reached into the main tank and pushed the float down to prime the filter and lines and to see if the aux pump worked and it does! That little pump primed that big filter in no time.. unless it was filled by gravity. I keep the shutoff valve closed just in case.
I also added in a dose of BioBor JF and star tron enzyme treatment to the fuel in the aux tank to prevent any issues with fuel storage.