Thanks a lot for your kind answers!
You know it is a challenge when you first start out and you want to find out what kit to use.
As you say, when you make 40 kits, the price of the bushings are negligible.
But when you want to try out some kits, it becomes more of an iussue..
I also find that company A sells the bushings for around 5 euro, and another comapny for 10.
But they don't publish any sizes on their site... And (since I'm Dutch) I rather have the 5 euro ones :wink: