This grip is designed to hold Games Workshop Model base sizes 25mm, 32mm, 40mm and 50mm by using Shims. It is also designed to grip a standard sized straight sided wine cork in it's base. It securely clamps together with three sets of nuts and bolts (M3 nuts and M3x12 bolts). I also used washers but I don't think their necessary.
It's ergonomic size and shape make it comfortable to hold and it weighs next to nothing so it doesn't add unnecessary strain to your wrist.
variable layer heights in Slic3r Prusa Edition. 0.2mm layer height at the bottom and 0.05mm layer height on the top layers
Print the two handle halves flat on the bed with supports. I printed in ABS and used 0.15mm layer thick discs on the corners of the handles to combat warping. For the spacers/shims I printed those the right way up on the bed.
For Supports I used a 0 layer Z contact with a wide interface space of 0.8mm. Support Space was 0.5mm
3D Printed Shims hold the model securely in place. With no shims in place the grip can hold a 50mm base.
Arranged on the bed in Sic3r Prusa Edition
Ergonomic grip with dimples.
Middle Get-a-Grip has been turned upside down and you can see the cork option.
One half of the Get-a-Grip with one half of a 40mm Shim designed in Fusion360