I made this simple tool to train pickup timering and I'm sharing here in case somebody wants to give it a try.

All it does is showing you a randomized number between 0 and 59 representing your pickup time, and you have to calculate when the item will spawn again as quickly as possible. You can activate/deactivate solutions being shown and change a few parameters:
- Time allowed between questions;
- Custom respawn times (+25s, +35s, +whatever);

Hope somebody will find it helpful. If you want to try it, you can find it hosted here:https://www.googledrive.com/host/0B0iwTKxkjJPcS1ZBYzIwZ3hrejg