Training tools (offseason)

I’m looking at working really hard this offseason to gear up for High School.

I’m probably gonna try a weighted ball program.

Asking any suggestions of products/training ideas for:

The other one: anyone ever tried one of those runnign chutes, they look like they’d be pretty good an relatively inexpensive ($60) but I wondered others opions

Also looking at a bushnell radar gun.
Want to see my changeup versus fastball, curve vs fastball, and also wanna use it to record progression, and see difference in mechanical tweaks.
Anyone have one of these/ if so what do you think.

I’m not much on gimmicks but if you were to get some things that would help you the most I’d suggest bands or tubing, a Physioball and one or more medicine balls. Good luck.