Can't comment on other things, but I have the following to report:
Slinger ammo is not, in fact, infinite; use a flashbug and it'll say 99, but after firing 3 it becomes some sort of rock thing that does nothing;
Sprint Speed only works in the hub (as said in another post);
Also note, F1 through F4 are for the game's hotbars; these cannot be rebound, so your default keys are directly interfering (even worse since they're teleporters); I know the trainer keys can be changed, but it's unneeded busywork. I suggest changing them to F5 through F9 instead.
You can change the trainer's hotkeys and then save your customized setting in the Settings tab of the trainer - SAVE CUSTOM SETTINGS
But: You need to customize the key settings each time the trainer is updated. The key file is located here -> C:\Users\YourWindowsUserName\Cheathappens\Keys\