Incoming file KML 3.45 MB. Reduced to 333KB and this used for subsequent conversions. First section Toronto to Annapolis and a little further. This gives a reduced KML of 341KB, GPX of 1.12MB which loads reasonably (12 Seconds) and PTF of 362KB which of course loads instantly. Sketch and indexing to come.
The KML has to be re-slimmed after being used in GPSU.