There’s no one forcing you to go with the radical names lend by WK or even the mnemonics they provide you either. My biggest mistake was to keep sticking with many of the radical names and mnemonics that WK provided when the really never stuck or worked for me. I use most of the mnemonics and radical names provided by WK but for several others I add notes or synonyms to the item, and that way learn more efficiently.
If you find the nailbat confusing, just add a note for it and name it “small hand” or what you wanna call it and if you get a wrong answer you can check the note and see that it was correct for your individual learning. Radicals doesn’t mstter that much after a while, as long as you can extinguish them and use them as building blocks it doesn’t really matter what you call them as long as it works for you.
Edit: Maybe should add that this only works if you use the ignore answer script.