Daripada bingung mikir balance point dengan mengkira kira,nih ada alatnya.mudah ,bisa ditiru dan modalnya murah.hasil presisi.
https://img.alicdn.com/imgextra/i3/3...!379783120.jpg
https://img.alicdn.com/imgextra/i2/3...!379783120.jpg
https://img.alicdn.com/imgextra/i2/3...!379783120.jpg
http://www.redsonsports.com.tw/uploa...42/04_orig.jpg
http://www.redsonsports.com.tw/uploa...42/03_orig.jpg