I look at it this way....You would not fly it on a B6-2, B4-2, or C6-3 right ?
It would be a B6-4, B4-4, or C6-5.
A B6-0 to A8-x is 3/4 of a full C in impulse.
While a B6-0 to A8-3 may work, I think a B6-0 to A8-5 would probably be better. I think the 3 second delay would be far too short and most likely it will still be moving upward at a pretty good pace. May shred a chute.

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