Not the first time I've said this in discussions of highland fashion, but, I agree with Jock. I'm not a fan of wearing a tartan style shirt with a kilt. I would think them more for casual wear with a pair of khakis or other pa*** myself.
As far as not mentioning the use of a belt with a PC in the picture it's easy to understand. My eyes were too overwhelmed to notice until after it had been mentioned.