Good work. This is the Holy Grail of bike maintenance. Well done. It's like the Haynes manials where they have spanner ratings for each job. Oil and filter is one spanner, easy DIY with hand tools. 4 spanners is the serious stuff like head gaskets and injection pump rebuilds. 5 spanners is "DIY? I hope you know what you're doing mate." Welcome to the world of 5 spanners. Wear that badge with pride, :-)