Flatter the better to transfer as little English to the cue ball as possible.
I've experimented endlessly with this & I find that you simply can NOT go too flat. The flatter the tip, the bigger the sweet spot & easier to park the rock. Try it totally flat...just knock the edge off a bit. I think you'll be quite pleased.
Below is a pic of one I made to skirt the law where phen tips are banned. Notice the phenolic core is absolutely flat. Works like a charm.:thumbup:
I've always thought the radius of the tip should be the same radius as the cue ball.
I use my jumper as a regular cue, meaning when I shoot a jump
I want to play shape too.....
Whether that means stopping the cue ball or follow or draw...
You get the idea
I need some shape on the tip for that...... When customers buy my jumpers, I assume they want to jump like me so I shape em up the same as my personal cue