No it doesn't. I'm not inexperienced (I'm not perfect either but don't tell my wife I said that).

In fact, my standard fuel tank setup is a simple - two line setup. One for the fuel feed and fill and one for the vent. So my engine cannot be flooded by me fueling it up since it is completely disconnected during that event.

I use OS F plugs, sometimes I use on board glow and that can help but it is usually only a mask to the problem so if the tank is still too high you will still likely end up with either an idle that is too high or too rich and unreliable.

I run inverted engines all the time; I wish I could spend some time with these folks at GP and actually what they are doing because I have only been consistently successful by putting the tank in the right place or going to a pumped/regulated engine. I actually don't own any of these at the moment (I have a regulator I have used in a drawer and have sold the engines I had with these features but not because of them).

So - my message is simple: Put the tank in the right place and things will work better more consistently. Engineer it right from the start - not wrong as most of their products are in this area.