It was already time!
This seed planting you are used to, takes you nowhere, LB.
WOW!
I like the blue glaze of the pot (it matches beautifully this bonsai), the "S" shaped movement, the "T-Bar" branches, the branches growing inside the S turns, the long, elegant bare trunk, the general technique of styling (clip&grow?).
The silt over the soil and the trunk that proves you've been watering it every day are a must, the natural organic soil perfect for the Netherlands, and finally, the amazing nebari (wild style the Japanese call it, isn't it?).
Congrats.
You should be proud of your bonsai!
PS - Don't pay attention to these people screaming "BIG TRUNKS! BIG TRUNKS!". They are envious of your slim tree.