I'll be buying a working QYT KT-980 Plus from a friend for my first mobile radio and I've heard that there are issues with many CCRs (cheap Chinese radios) with poor thermal issues with the finals. In many cases I've read the issue may be little or no thermal paste between the final and the heatsink, and in other cases it may be an underrated transistor that is being overdriven to give a higher output. The QYT KT-980 Plus doesn't so much have the latter issue as the transistor seems correctly sized for 75 VHF/50 UHF watts or so, but I wonder about the thermal paste and heat sink issues. I want to better avoid this issue with my unit and I thought I would take the final transistor off to add some high quality thermal paste underneath. I don't think it would hurt, assuming I don't damage the final or board in the process. I want to phrase this as a general question here and get an idea on if this would be a good idea to try and if anyone else has done this already because I think this may be an issue that a lot of CCRs have. I suppose these radios are made on mostly automated assembly lines and little attention or testing is done to evaluate how well the heat sink works under a heavier duty cycle of use. I hope I don't sound like I'm overthinking here, there isn't anything obviously wrong now with the unit I'm considering buying but I was told (and saw) that the heat sink wasn't heating up at all with a moderate use test I watched. That may not indicate anything wrong but at least I'd like to touch the final transistor (after turning off the power) after a QSO test I'll run to see if it heats up at all and if the heat sink material adjacent to it heats up along with it.