Water Pump w/carrier bearing

Update; 8-20-19
i have updated the pipe inlet and outlet making them 1mm thicker
and updated the impeller after i noticed that the vains were in the wrong direction.
I printed the gasket in tpu, the pump seals up good but wouldn't pull a prime due to the impeller being backwards.
I was looking for a water pump and couldn't exactly what i needed on thingiverse so design my own.
requirements:
2 - 608 bearings
2- 8mm shaft collars
1 - split 8 mm shaft collar
1 - 140 mm long 8mm shaft