Questions about trailer couplings on the RAV3 XA3?

Hello, we recently bought a nice RAV4 XA3 and would like to give it a rigid (!) trailer coupling. I’m looking for help with the following questions: – I have read in other forums that there is a problem with some trailer couplings that the rear door will no longer open when a trailer is attached, or that it will be very tight. Can anyone confirm that? Especially in case of removable Westfalias this is supposed to occur. Does any of you have a rigid mont – Does anyone have any experience with these cheap no-name AHKs that exist on Ebay? For example, something like this here: Cheap AHK on Ebay Are there any known problems with the no-name AHKs when installing or qualitative differences? – Can anyone recommend a certain AHK or advise from certain manufacturers/models? Thank you Best regards