Thanks for your message. The tool should be able to handle the first part of the activity as well as the last. I'm still testing and improving the tool, however, so if you want, use the contact form (or this post) to provide sample files. I will need to know the following:
- The source file (the one where you had a GPS problems)
- The course file
- The start time
- The end time
I will give it a go, and see if I can make it work. It may be necessary to improve the tool. I haven't had a ton of files to test with, so this is an opportunity to improve the code.