Good report HF, and nice pix!
The DEI is not magic, but it helps probably as well as the blanket and it's thinnner, takes less room and won't fall apart from taking tank on and off. After I ceramic coated the pipe, I have not heard any boiling of fuel at all even in slow, 1st & 2nd gear uphill rough climbing at 8-9K elevation with the fan running almost continuously. Of course my 390 has no fuel venting problems because of the 70degree sub tank. It has it's own large vent that also helps the main tank in odd pressure/vacuum situations. LOST has the subtank too IIRC so should not have that problem.