The fuel tank issue can be helped by replacing the stock tank with a DuBro 16 ounce. Then install it right against the firewall as low in the fuse as it will go. Mount it with the "Tang" on the tank on the bottom and drill two new holes through the firewall for the vent and feed lines to go through the upper part of the firewall. Make sure to shorten the screws holding in the nose gear so they don't protrude through the NG mount and pierce the tank. This will get the fuel in a much better location. It doesn't solve the problem 100%, but improves it a bunch. With my Evo .60NX on the suggested Macs pipe and header, the needle setting will start the flight just a bit rich upright, will run fine through outsides, and will lean in to a good setting everywhere after a minute or two of flying.

This was a problem with the original Phoenix 6 and 7 and was one of the reasons pumps became popular then. But with a firewall mounted nose gear you could get the tank even a bit lower. The mounts in this P-7 keep the tank a bit higher. Also, I am using a helicopter style fuel line pincher to keep the line closed after filling the tank. Keeps the motor from getting flooded when the model is just sitting. I'll try to get some pics of what I have done posted.