D&D-4-like Skill Challenges in Savage Worlds

This is a first sketch how you do skill challenges in Savage Worlds. Definitely worth a test run and could be a better way to handle music performances in The Band.

Depending on how complex the task is, a certain amount of successes is needed. My test run decides difficulties on number of participating characters, but that could be too metagamey.

Easy: [number of participating characters] successes
Normal: [number of participating characters x 1.5] successes
Hard: [number of participating characters] x2 successes

Players in general can choose the skill they want to use by themselves. The GM can veto skill use, that is not described well. But why not using your Knowledge(History) skill to get the band mimic the famous performance of the Sex Pistols in Winterland? ;) Obviously repeating the same shtick over time becomes stale.
Each Raise counts as 1 extra success.

When they got 3 failures, the characters finally lost... (Maybe scale that too?)