I am looking to find a good replacement Diode board for my 1983 R80RT. Other than an original BMW board, I am looking at possible after-market replacements that may be more resilient than the original. I have heard that there are some out there, does anyone have a suggestion. I found one called a "Thunderchild Heavy Duty Diode Board" for about $90, anyone have experience with this product. I was also told of another one by a parts worker at the local BMW shop, but can't find the card with the name on it. I know an OEM BMW Diode Board is about $106, but supposedly some of the after-market ones are better.