Conrad johnson 350 power cord

I was testing Conrad Johnson with Transparent Opus MM power cord and discovered that I like it better than the stock powercord with 20amp IEC connector (not very sure whether its worth the upgrade or I can do better else. In fact I seems to hear a better improvement with a BDR cone on my transport) However, I noticed that it does not have good fit into the amplifier and seems to be weighed down by the weight of the cable. I believe better fit will enable it to maximise the quality of the power cord. Anybody out there has any experience with different power cords and how do u feel about changing the stock power cord? I m using the amplifier with CJ ACT2. Most of my cables are fr Transparent. Your opinion is much appreciate and thank you in advance. Happy listening