This is fine. Customers want to add more features or change things all the time.
You have the option of working out the price yourself via our easy to use extras information. eg. If your package is 1000 and you want to add an extra 4 sensors, you can simply add the cost of the extra 4 sensors to the package cost.
Alternatively, give us a call or fill out the contact form. One of our consultants will try and help you our to the best of their ability.