The amount of oil I use for each print is a generous drop off a bamboo skewer I dip into the oil. Not very scientific, but it works. A little too much is better than too little. Slight beading is OK. I've done this with B9 Red, B9 Cherry, MadeSolid Black, and B9 1:1 mix. I see no negative effects at all.
I filter the resin from the vat back into my main container after each print.
I'm at 14 months with no recoating of PDMS.
Like PDMS, you do have to be careful about damaging the release layer. If I get a small something outside the print area, I cut it out with a #11 Exacto blade, and pull it out. I can then continue to print with that NuVat for weeks or months. If it is inside the print area, it gets problematic. It can create floaters and in time the blade causes a tear and the NuVat has to be replaced.
If some resin gets stuck to the release material during a print, DO NOT use your finger nail to remove. That will damage the release layer for sure. I use a plastic paint scraper and gently work it off. There is often little or no damage when doing this.
Evert just told me a technique he saw on another forum. Put a drop of resin on the stuck bit. Put a piece metal on top of it. Expose from the bottom. Pull off the metal and it will pull off the stuck bit. I have not done this, but it sounds like it could work.
It is also important to be careful about how you set up your build layers. Large solid rectangles covering most or all of the print area can cause sticking, even with oil. I use a randomly perforated build layer and print over about 90% of the available print area each time.
Attached is a screen shot from Rhino of the build layer template I use. I then attach my models to this and print away. The reason I use a build layer is that I print so many models at a time, five to 25, it allows me to handle them efficiently rather than one at a time. I could reduce the drag by dropping the build layer, but that would increase my handling time many times over. If you are printing a few models at a time, you could use a smaller build layer for each model. That would help to reduce drag at launch.
I use default settings, but cover the projector lens during the second half of the second exposure. The long second exposure is the hump. I could probably create a custom "Material" and edit the time, but I'm being lazy and covering the lens works.
I'm over waking up in the middle of the night wondering if the PDMS has failed again and ruined a vat 10 hours into a long print. I've had no vat killing release layer failure since using the NuVat.
Good installation is key. Evert would have to speak to the details regarding installation. I think some videos were on the table at one time. I will ask about that.