Do I need to use the Power Kit?

So my issue is similar in that I have no existing doorbell or doorbell wiring and I do not have any space in my consumer unit. Need to understand whether I need to use the Power Kit and where I would install it if necessary Here is what I have done Bought the Ring Doorbell Pro which comes with the transformer Wired in a spare plug that I rated to 3A for plugging into mains socket Cabled to the transformer using mains terminals 5 and 6 Fitted the transformer into a junction box or single consumer unit Ran a length of cable to the doorbell from terminals 1and 4 Wired to the doorbell Powered everything up and it is all good Doorbell showing over 4000mV on the App and it has been working fine ever since. Do I actually need to use the Power Kit given I have used the Ring Transformer and my power is ok