I wouldn't be surprised if you could just go with it being dry as they see zero friction, just a little bit of compression between parts. If you wanted to put grease / oil on the o-ring, it would only need a very small amount.
If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on, and the dedication to go through with it. We slept on floors. We waded across rivers. -John Carmack