If i change my cooling head to a different type will this affect the tune i had? The motor is an O.S 12tz with the silver head and i swapped it with a cooling head from team titan and it looks totaly different, will i have to re-tune my motor?

Nitro motors are one area of this hobby that i just fail to understand properly

Cheers guys

If you did not change the button or shims then no, it probably will not affect the tune much. A little perhaps depending on whether it cools better or worse but not much.

Sweet nothing to worry about then as i didn't change button or shims. Thanks mate