How much solution should be used?

[Bernd]

CRB machines won't produce the same light level of foam that you'll see with a shower feed machine, such as a Cimex or a rotary machine. You will just need to get the feel for how much to lay out the correct amount. A little practice and you'll have it.

Yes, i think a little practice will help. I have to say the smell of your products is great! My customer love it!