Someone gave me some flightpath golf tees a while back. I thought they were cool, but have three major drawbacks:  (1) it's hard to get the ball to sit atop the tee; (2) the tee isn't long enough and/or it doesn't have any demarcations to set it to the same height every time; and (3) they're stupidly expensive.

Thus, this is a work in progress.  I designed these to go into the ground with about a 10 degree tilt to the rear. There are 5 heights of tees, each with a stop on them that both helps set that angle and sets the height to the center of the ball. My driver head is about 64mm tall, and as most pros suggest half the ball above the club head, I use a 65mm tee most often, but will go to a 60mm when I'm trying to keep the ball down, or a 70mm when I want to launch it higher.

The tees are designed to be printed in TPU with no supports needed.  I created 6 build plates - one with each of the 5 tee heights so you can see which you like best, and then 5 plates, each with 36 tees. Those beds require about 108g of filament (~$4 at $40/spool - I havent tried it with PLA or PETG) and take a little over 4hrs to print at normal speed on my X1C.

Hit me with any observations or suggestions… designing stuff is playtime.