Screw holes for self-tapping screws

[thegoodguy]

Hi,

Essentially, I want to print a block/spacer to raise the level of a doorbell button. The block would affix onto the wall where the button was, and the button would then be screwed onto the block.

The problem I'm envisaging is the infill of the block will not be substantial enough for self tapping screws to bite securely into. Is there a way to print internal areas more solid?

I have attached an image to illustrate what I'm trying to get at. The block on the left is what I think a regular 3D print would look like; Four big holes running all the way through for the screws that affix the block to the wall, and a hole (or holes) fix the doorbell button to the block. All of the internal area would be infill. Looking at the block on the right, is it possible to have a "halo" of solid print around the single hole?

The illustration is over-simplified just to help get at what I'm after.

I am using Cura 4.71 and my printer is AnyCubic i3 Mega S.

Many thanks in advance for your help.