買左兩隻GT5400,原裝得3PIN,但見到佢有PWM焊接位,香港有邊到幫人焊PWM?

買左兩隻GT5400,原裝得3PIN,但見到佢有PWM焊接位,香港有邊到幫人焊PWM? 新高登有冇? 有冇Ching做過可以代勞? 可收$~