I feel it wound be a slightly slicker process if when creating a Workshop Job, the first task is to select or create a customer as opposed to the current way which Comments/Service Item page opens first.

This would mean that if you are creating a workshop job for an existing customer, by selecting the customer first, the serviced items dropdown will be already populated with their previously serviced bikes. As it stands, I immediately have to escape out of the Comments page, open the customer page to select the customer, then reopen the comments page again to select the Service Item.

A minor change but as I have said, I think it would flow a little better.