This design was made from the base of ahalekelly's pump grip design, all I did was use the included f3d design, roll back the history until the surface design that he made is gone so I have a blank template to put my design.
I'm sorry that I won't be sharing my f3d file like ahalekelly because I'm a CAD newbie so my design process is extremely messy and will probably mess with your designing experience. I would recommend you use ahalekelly's f3d file instead.
Both files are on the same orientation, when printing please remember to mirror one or the other. the only difference is one side is made with a hexagonal hole to hold M3 nuts.
This design requires 3 x M3 30mm screws & nuts