Each plane and each battery will be slightly different. A 4000 Admiral Pro will weigh much differently than say, a 4000 HobbyKing Turnigy Heavy Duty battery.
The CG that's printed in the manual is already a "suggestion" and is a starting point. For anyone to tell you what they use as their battery placement may not necessarily apply to you. Why not just make a mark on you wings where the manual suggests for the CG and start by placing the battery so the strap holds it in the middle. Hold it upside down with canopy on and see how it balances. Move the battery accordingly till it balances on the marks. After the first flight, adjust accordingly to make it fly the way you like.
The CG that's printed in the manual is already a "suggestion" and is a starting point. For anyone to tell you what they use as their battery placement may not necessarily apply to you. Why not just make a mark on you wings where the manual suggests for the CG and start by placing the battery so the strap holds it in the middle. Hold it upside down with canopy on and see how it balances. Move the battery accordingly till it balances on the marks. After the first flight, adjust accordingly to make it fly the way you like.
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