Hi! I made an external software for Cura to combine different G-code files into one file. It can be really useful if you want to test different settings on your printer within one print. You can do that in Cura with Support Blocker but not for all settings (most of them are there but there are no settings like retraction). So in order to do that with retraction you would need to combine layers from different files into one manually using text editor, but G-code combiner does it automatically. Feel free to share your thoughts about my software and please report issues if they occur so I can fix them 🙂 My software is available for download on Github: https://github.com/rara64/gcombiner Thanks!