IC7000 reliability

Some people have had issues with the reliability of the IC7000 driver transistor which gets too hot and can self-destruct. SV8YM has some modifications to help, putting improvised heatsinks on the effected devices so they run cooler. See his blog at http://sv8ym.blogspot.com/.  This is a rig I've considered purchasing but I have been concerned about the heat in such a small box and consequential reliability.