Dear Khun Kaewta,
I hope you are well and would like to wish you all a happy new year!
We did not come back to you sooner concerning the wooden packaging because we tried but couldn't get specific information, I mean, there are a lot of different cases with different sizes and the cost changes a lot.
Given that you buy many different machines and grinders the packing details change everytime and therefore it is not possible to identify one case and define the surcharge, which would be anyway very expensive.
Probably the best way is to look carefully at the goods when they arrive and just to be sure sign conditionally the consignment document.
I remain at your disposal for any information