Sure, it can happen to change your mind :) We can do it safely. The important thing is that you notify us the same day you completed your order and in any case before it has been entrusted to the courier for shipping (we usually ship the next working day at 8:00) Write to support@bowlpros.com indicating your order number and the products and quantities you want to add, remove or replace. If, on the other hand, the package has already left, unfortunately we will not be able to modify it.