What I don't understand is why the BME props don't fit BME engines without drilling....strange.
from their site -"... come with a 10mm pilot hole to fit DA, 3W and ZDZ engines."
MARKETING 101 - you catch more fish with a bigger net.
A smart idea would be for them to offer their props custom drilled to match the modeler's specific engine. Charge an extra buck per prop for the service. Dunno why no one does this.