Ron, you do not need advice from me! However, I would add one thing: Whilst I agree with the majority, puple hose DOES look so good with the IoS kilt, I have a feeling that if worn with the shirt you describe, you will look unbalanced ....... visually, I mean!

The kilt is dark, the hose is dark, your footwear is probably dark (it should be!) and so from the waist down you will be 'heavy' with nothing dark to balance it above the waist. Can you perhaps wear an open waistcoat (sorry, vest)? Alternatively, I think I would be considering a mossy-green shirt/polo/whatever in place of the white one.

Just me, ol' pal!!