Hi everyone, new member here. I just purchased a working CR-2020. I opened it up yesterday to clean pots, etc. and check to see if the Service Bulletins have been performed. I have modest to average electronic repair skills. The power switch was shorted, I rebuilt it and added the jumper as advised in the SB. Works great now. I inspected the electrolytic cap board to see if that SB work has been done. There is some scorching on the board so part locations are difficult to read. There are a few components raised up off the board and the soldering for these parts appears non-factory. Can anyone tell from the attached photos whether the subject SB components have already been replaced? http://audiokarma.org/forums/index.php?media/img_1787.15983/ http://audiokarma.org/forums/index.php?media/img_1790.15984/ The 2 transistors on the power supply board referenced in the SB appear to me to be original based on the part number. I touched up the solder points and am wondering if these transistors should to be replaced as a matter of course or can I just add larger heat sinks? A quick check online suggested that these parts may have been obsoleted. http://audiokarma.org/forums/index.php?media/img_1796.15985/ Thanks is advance.