Better j-head mount block for Prusa 3dPrintedStuff

Much better than previous one , needs some rebuild of extruder and makes filament roll open for easy access. 2x Win :D
Remove fan from front of extruder motor throw the radiator away and mount fan directly on the mount block.
For me worked best after i changed slic3r option to turn fan always on with 80% power.
Note: holes for screws need to be drilled from hand