well thats a td05-20g.
It'll kill the 34 in top end power.
You can get different variations of the td05. 16g, 18g and 20g are most common.
The 16g is the closest match to the vf34.
The bigger the number, the higher the topend power, but at a trade off to more lag.

I run a whizzbang td05 and prefer it to the 34.

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Balls.