Ok - idiot question here, but if someone has a guide to using project boxes and mounting components, it would be greatly appreciated. I have a project using a PCB audio amplifier (about 3"x4"), two transformers, four aluminum resistors, and a couple other items. I received a project box with pre-positioned mounting hole - none of which work for my components. Is there a typical method to create a 'base' for each of the components to mount on to? I've done simple home automation projects before, and these did not require the box/mounting, etc. I've spent three hours searching for a tutorial/video, to no avail. Again, apologies and any help is appreciated!!