Fuelers are fine when dealing with other engines but a YS will show you their faults in a heartbeat. The easiest and most foolproof is to run lines straight from the tank routed outside the cowl to connectors and back in to the carb. For aesthetic results do the fuel dots as stated above. Tee's can be a fuelproof plastic or metal(local aquarium shop!). This is the method I use most of the time on my planes. The only place I use a strap or tie wrap is on straight pipe(fuel tank).