Stephen, I did most of what you did after purchasing my 09' 40 series Presara, 2 years ago, with 70,000 klms on it..
Additionally, I replaced front and rear rotors and brake pads..
Also, a year ago I replaced the potentially troublesome water pump, before it had a chance to fail...Im not sure if this is an issue on 50 series cars however...
Now I do an oil change twice a year, useing Penrite full synthetic
5w30 oil, at 6 month intervals and I log book service it once a year.. so 2 services a year.
I hope you get many years of happy motoring, as I have so far..👍😉