Advice on toppers on ziplink bed

HI, Great post. It helped a lot in clarifying questions about bedding!

I have a SuperKing Zip and Link bed. Although we can’t feel the zipper in the middle we do feel the dip. We want to get a topper to try and solve the issue but a normal luxury topper still didn’t do it. There are some ultra thick luxury toppers as I wonder if they would do the job. Have you got any experience with it?

Got recommendations?

Also, the normal super king topper doesn’t fit quite 100% on top as it turns out to be a few centimetres smaller on the sides. Is there a chance that my super king is actually larger than the norm?

Thank you in advance. Caio. .