There is no challenge in writing a wall which is so difficult as to be practically impossib!e - just make the connections ludicrously obscure, like these. A good wall is one where, even if you don't get the groups, when you see the answers you realise you should have.

I had no idea about the somersaults, but there may be some puzzgridders out there who do (Is there? Reveal yourselves!). Aside from that, I thought the other connections were good. Was worth it for Tiny Kox alone...

very clever [no - not an aficionado of gymnastics, tipple over my limit] very informative. 0/10 for me 10/10 for you. well done and thanks

Nighteyes is right

The Derwent set should past tenses rather than past participles.