Ordinarily I keep away from arguments especially when it's over something as minor as a bit of oil leaking from a bearing but when some AH talks about crickets and sends a PM saying "maybe stick to what you know next time champ" then I guess it's worth a reply. All front bearings leak a little, if they didn't then they're likely to seize but the amount of oil needed is very small, on the order of a couple of drops a minute. Manufacturers provide a means to reduce the oil getting past the front bearing by using a channel that connects to the intake port when it's at a low pressure to pull excess oil back from the bearing. Some car "hop up" guys in their "wisdom" blank off this channel thinking it's giving an air leak problem then wonder why there's so much oil coming out the front.

I've been playing with model engines (mainly glow, a few diesels and FWIW there's no such thing as a "nitro" engine) for around 55 years and I'm an aircraft engine fitter as well. So some little AH trying to protect his reputation as a "hop up" expert can't intimidate me.