Seems unlikely assuming everything is correctly assembled: assembly paste and a torque wrench.
On the extensions the weight is on the elbows, which are more or less over the tops and close to the stem: less leverage than with, eg, drops.
On the start bars, you're in a similar position to being on the hoods of drop bars, with a similar amount of leverage.
Just go with whatever the frame was made for: presumably the forks are threaded.
@Scilly.Suffolk started
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Seems unlikely assuming everything is correctly assembled: assembly paste and a torque wrench.
On the extensions the weight is on the elbows, which are more or less over the tops and close to the stem: less leverage than with, eg, drops.
On the start bars, you're in a similar position to being on the hoods of drop bars, with a similar amount of leverage.
Just go with whatever the frame was made for: presumably the forks are threaded.