During installation of a dephtfinder on my 05 rxp, I had to take of the air intake hose, mounted in front of the supercharger. Inside this hose there were a few drops of oil. Is the normal after 5 hours of running?

Yes, it is perfectly normal. The engines PCV system dumps right into the air intake tract. If you have the oil overfilled the problem is worse. Make sure you have a normal oil level.

Thanks. I just became a bit worried seeing the oil at that place :-)
So I will finish up the installation of the transducer for the dephtfinder. The space is rather limited in the rxp, but it is possible.
Friday I will have the onboard computer programmed for showing the depht readings in the standard gauge.

Any pics of this installation?

Pictures are in progress.

I checked the oil in my new RXP before I took it out the first time and it was right at mid-point. After putting 4 hours (at low rpms) on it, I did the stage 1 stuff. I noticed oil in my stock intake all the way back up to, and into, the supercharger also. Kinda pissed me off, did not like that, decided to do something about it.

I bought a remote oil mounting bracket, fittings, and some 3/4" hose, clamps, oil filter, etc. I then modified the oil filter (opened up the rubber in the holes in the top of the filter) so that air now flows very freely thru it. I ran the hose from the motor into the center of the filter, so the air has to pass up thru the filtering element before making it back to the intake. I clamped the assembly to the battery bracket, front side, and ran the hoses.

This way, even if some oil comes out of the engine, it will be trapped in the bottom of the filter, and not make it into my intake, supercharger or motor. I don't think this is a big deal, since all stock RXPs blow PCV oil into the intake, but I just preferred to trap it and keep it out of the intake side of the engine. And I can easily check how much oil has blown out by removing the oil filter anytime.