I love the product but you should have some data quality rules to validate the shipping cart before the payment
I bought the Aluminum Servo Fixed Part For RZ001 and XTS-F10 and the Aluminum Servo Conversion Block For RZ001 and XTS-F10. It is technically impossible to use the both spare parts at the same time. If the system had a warning message saying that, it will save money on the consumer and it will show that rlaarlo is worried about support and not just push spare parts (beginners help)