A workshop could ask for the model, usual string setup and preferred date. Customers would choose between repeating a known configuration and discussing options with staff. Each racquet would receive a tag linked to the record. Price and availability would be confirmed before work begins, followed by a message when collection becomes possible.
An illustrative example to adapt to your business. It does not represent a completed project in this municipality.
Can the website recommend a tension automatically?
It can explain choices, but an individual setting should be discussed with the responsible person. Collect playing habits and known configurations rather than promising one setting that suits everyone.
How should two racquets from one customer be tracked?
Create a separate line for each racquet with its model and instructions. The drop-off summary lets the customer check that the requested configurations have not been reversed.