Whiskey,
I just sent a PM about the engines send me a email on my gmail account. No big issue with fueling a bubble free tank (BFT) . The tanker is handy but not required you need a syringe that will hold about 5-6 oz total.
Dub Jett model aircraft engines- Jett Engine Saftey and Technical Documentation this 3 minute video will explain everything you need to know about BFT
You will NOT pick up any rpm using a BFT. It will allow you to dial the needle closer to peak and it will stay there until the tank is almost empty before the mixture changes.
Sparky