Sounds and looks like real progress (and Ollie looks like a different cat! So nicely rounded!). Mine still do a lot of whacking and chasing - sometimes immediately after a mutual grooming session and before another mutual grooming session. Now I have to laugh when I see one preparing to stalk the other - that little rear end shaking just gives me the giggles.
And, don't worry about a hiss now and again down the road - that will happen with the most loving of cats!
And, don't worry about a hiss now and again down the road - that will happen with the most loving of cats!