K8400 dual j-head

==== v7 ====
This is replacement for original dual head.
1. You need to make space for rod in heat sink using pile it is easy to do.
2. I drilled a hole in the heat sink on for the M3 screw, to block heat break in best position. It is for leveling nozzles.
3. You need 4 graphite or bronze bushing bearing 8mm x10mm x10mm or 8x10x8 or similar
4. 7psc M3 inserts 4x4mm (or make own mix for typical nuts)
5. I replaced stepper drivers for TMC2208 on X/Y and S109 for extruders.
6. https://www