MFJ 998RT Repair and Mod - failed K1 Relay and R121 

This is an alternative repair to the one suggested by JH3CLV who fabricated a heat sink for R121. This video and repair was done in 2014. Unfortunately, since then JH3CLV has suffered 2 more failures. However, my tuner has not suffered a failure for 4 years since my repair. However, no inference as to the efficacy of my approach should be taken from this experience as I most likely have been just lucky!
Links to JH3CLV discussion on issue:
radiovillage.bb...
www5a.biglobe.n...
www5a.biglobe.n...
Any comments or suggestions as to why this situation occurred and what are better repairs and mods are welcome. One mod I do intend to make is to use heaver gauge leads to the resistor than the ones shown.
73,
Frank