What's the Underlying Form of the Aspirate?

I think he has a lot greater just because he has so few sounds to start with that of course you're gonna get quite a bit going on maybe he was like plugging in the first 500 years of his sound changes. I really do suggest people take a look at it because it has some interesting ideas about what happens when two aspirates come together and other sounds come together. There's a weird rule where inner vocallic N turns to L and then nasalizes the following vowel but that all that is very interesting stuff to talk about. It doesn't say anything here about how long ago this was spoken or anything I was just speculating but so what else is interesting other than the crazy terminology