Rehearsal

What the rehearsal does is to provide more accurate measurements of weight and dimension of your parcel, allowing you to use a specific shipping line

You need this because, sometimes, the initial weight + volume calculated by PandaBuy is an estimate, if your weight is just about too high for a specific shipping line, then a rehearsal might be able to let you use that specific line

Only in that case, then, rehearsal would help you use that specific line.

It is not recommended to ship more than 10KG in one package