Hello! in a bit of a pickle

I've converted to a larger set of XK alloys while providing a lot of benefits, there are some drawbacks, one, in particular, is the grease cap not fitting properly (without the centre cap that is)

I'm familiar with and have heard of the "hammer/bash the grease cap" shape. but I'm not super familiar with how I should proceed. Does anyone have experience or has done this specifically, how should I go about doing this? If not did you replace the caps with a different type of grease cap, and if so which ones?

I've attached a lovely photo to show which XK alloys I'm running.
Appreciate the advice as always.

Use a small hammer to reshaped the "dome" of the grease cap. You don't have to bash. Not much more than tapping is needed.

Cheers
DD