A C - I was interested in your comment about the minor mod fee. Our fitter is CAA approved and has been around years (not that that makes any difference). To be fair, he didnt say there would be an additional charge for the minor mod but he said the fitting of a mode S transponder required a minor mod because it constituted a different piece of kit than that listed on the avionics schedule. In my expereince a minor mod always results in a fee - which he might well absorb as part of his costs.
Do you know otherwise?