E3D Titan Flex Upgrade

**print with support!**

This is an upgrade for the E3D Titan Extruder.

Problems with current Titan design :
- Filament insertion constantly missing the lower filament path in Direct Drive configuration
- Flex/Nylon filaments sometimes gets kinked out because of no upper filament guide
- PTFE path has little grip

How this solved the problem :
- Longer grip for PTFE guide
- upper filament guide
- easier filament insertion
- drop-in replacement

Printed in PLA. Use stronger/stiffe