Route Query

[routeconverter]

So you're saying that the blue path (at least for Routes) may have nothing to do with what I export (as a GPX file).

Not nothing, but you'll find only your 4 waypoints in that GPX file and the device that reads the file has to calculate the intermediate points to form a route.

Consequently, I could dot my Waypoints, view them as a Track with RouteConverter to check that it matches what I'm after but export as a Route and although the blue path will suddenly change from when I viewed it as a Track, the Route will be stored 'correctly' on my GPS. If that's the case, then that's great - your app is just what I'm after.

RouteConverter should work like you assume it. Just make sure you switch to 'Route' before saving before that changes the GPX that is written.