S/C Rebuild Interval/Symptoms

Posted in S/C thread but seeking more attention...I'm not paying a shop to rebuild anything but the rotor pack. And if I can figure out how to time those I'll do that as well.
I'm looking for some input on rebuild intervals and diagnosing when a supercharger is ready to be rebuilt. This is the second supercharged 1st gen I've had. All I had to do on the previous one was change the nose cone oil.
When I bought this truck I was pretty certain it was due for a rebuild and promptly ordered a rebuild kit. It has parts needed to rebuild everything but the rotor pack.
From the video below, would you say the supercharger is due for a rebuild? It seems a little on the noisy side at idle to me. No strange noises at higher RPM, and it's able to hit 6 PSI max boost. I haven't removed the belt to check for play in the nose cone yet. No idea how long the S/C has been on the truck. The PO owned it since 2008 when it was at around 100k miles; he never even changed the oil in the nose cone and it's at 205k now.
Second, if it's due for a rebuild is it dumb to rebuild everything but the rotor pack? My plan would be to send the rotor pack in to a shop so they get re-timed properly and do the rest myself if it's necessary to do that as well.

https://www.youtube.com/shorts/JW6sj9iI74o

 

I'd rebuild the nose cone with new bearings, coupler, and oil and see how it is after that. It does not seem all that noisy to me.
The replacing the bearings and coupler in the nose cone is an easy job if you have a press. Definitiely a DIY job.

 

Good, I'm glad it doesn't seem unusually noisy. That is my plan, looks like an easy job. Since the kit came with the rear needle bearings I'll probably just pull the whole thing and do those as well.
The next big question I have is how often do the bearings in the rotor pack need to be replaced?

 

I bought my supercharger 1st gen new in 1998 and put 700k miles on it with 5 rebuilds along the way, now I’m running the 1320
supercharger.
Out of those 5 rebuilds 2 were rotor pack bearings failed and one rotor pack seal failed and all the snout oil was getting sucked into the supercharger and I never saw a leak because it’s getting sucked into the engine. The rotor pack seals do fail over time and that’s why it’s important to check the level.
The problem with the 1st gen supercharger is the rotor pack bearings are tack welded into place.

if you don’t replace the rotor pack seals and bearings your still just running on borrowed time.

the smaller the pulley the more wear and sooner a rebuild will be needed and 1st gen parts are hard to find if a part fails like the snout etc

 

You can check to see if the rotors show signs of touching, if so, get the bearings replaced. I've always believed that when the rotor bearings are bad, the supercharger begins to sound louder at idle.

Good watch here.
https://www.youtube.com/watch?v=X6T0rr0BTrA