Level 126 solution

Solver-verified route

1. Place Shooter 1 in lane 1.
2. Place Shooter 2 in lane 1, then wait ~4 ticks.
3. Place Shooter 3 in lane 1, then wait ~7 ticks.
4. Place Shooter 4 in lane 1, then wait ~12 ticks.
5. Place Shooter 5 in lane 1, then wait ~23 ticks.
6. Place Shooter 6 in lane 1, then wait ~43 ticks.
7. Place Shooter 7 in lane 1, then wait ~6 ticks.
8. Place Shooter 8 in lane 1, then wait ~37 ticks.

Flow mode clears this board in 39 shots with 0 relaunches.