Attached are .kml files for both flights so you can see the flight tracks for yourselves. If you have Google Earth installed, just double-click on the files. For the web version (https://earth.google.com/web) select Projects / Open / Import KML from computer.
From what I remember of the GPS module data sheet, differential, and hence speed, is very accurate, position accuracy moderate (about 3m) and altitude much less so. This is reflected in the fact that some negative altitudes were recorded! Where this happened I clamped the altitude to ground level. The recording is every half-second, hence the rather jerky traces.
So this might inspire me to make a new version with modern electronics, perhaps incorporating attitude and G-force measurements, and with a shorter recording interval, and perhaps interfacing with the telemetry now common in today's radio systems.
Oh, and if you look carefully at the second trace you may see the track of the Walk of Shame