Damages: 125/200/275/350
Mana: 80/100/120/140
Cooldown: 25 seconds

Damages: 100/175/250/325
Mana: 65/85/105/125
Cooldown: 25 seconds

Aghanim's rework:
Current: Increases Heat-Seeking Missile target count. (changes Heat-Seeking Missile into 4 missiles)
New: Increases Heat-Seeking Missile target count with a random pure damage missile. (changes Heat-Seeking Missile into 4 missiles by shooting 3 magic missiles and 1 missile which is pure damage).

Why? Because if we look at the design on Tinker, we can see the 3 holes of barrel are located on his left side and there is one hole on his right side. Aghanim is giving a special of change on any skill of a hero. Why the logic cannot be applied on Tinker's change? Do you want to tell the community that Tinker is shooting 4 magic missiles using the 3 holes? How 3 holes can shoot 4 missiles? What if I say, "The 3 holes are shooting 3 magic missiles while another hole is shooting pure missile if Tinker acquire his aghanim"?