I'm just checking to see if its possible to intall the experimental G5 unit in a certified (legacy) plane? I want to install (2) in my plane to eliminate the vacuum system. I'm wondering if I can buy the less expensive experimental units, using the following document: https://www.seaerospace.com/documents/FAA_vacuum_replacement.pdf Just trying to save a few $$'s...thoughts? Is there a way this can be done? Besides the STC, is there any difference between the experimental and certified G5?