robo 3d r1 dual fan shroud "black widow" remix 10mm fan

i re-modeled where the fan mounts so there would be less choking on the fan and made some miner adjustments to the opening near the hotend so it would not touch the heater. still warps a little bit but no longer touches

with the redesigned extension it no longer works for the 40mm x 40mm x 20mm fan