Thanks for your comment.
Indeed you are right, the compressor should provide enough air and the bottle tightly sealed ..
even that did not have much to go far ..
So I have a tube in there made with a smaller hole.
I like this model is a challenge to make it as beautiful as possible
The curve is indeed the worst part to do, SO i started at the back
haha yes the watermark is quite annoying that there will be placed. what one do you recommend?