Any hope for improving GPS track?

[Jamie BG]

Agree.
Most of mine are walking or paddling, so nothing major speed wise - usually under 6km/hr.
And yes occasionally you hit the odd bump/hiccup, but generally find the track is easily within the river/canal while paddling, and while the walking track my wander slightly from side to side on the road, it virtually always gets it right. I occasionally get the odd bump /hiccup - maybe one in 5/6 tracked activities.

Don’t foget that GPS fixes are normally only accurate to around 5m - so even with great fix to numerous satellites, still not going to be perfect.