I know there is a thread about this but i thought it better not to dig it up so here is my progress so far (my only 2 hours of free time this week)


made from a piece of 12x25mm ALU and uses the same hole spacing as the heatsink block from DaveK0974.
Because the thickness is 12mm compared to the 8mm of the original block the standard reprap pro bowden tube fitting need a 6mm clearance hole 4mm deep or there will not be enough clearance between the heater block and water block.

water fitting are 6mm push connectors with a M6 thread and cross drilled at 5mm (need a shorter grub screw)