I replaced the board with the replacement board and have had no troubles for many years, I got it from BAA but I cant fin it on their site, it is the same as this one at MAD http://mad-amusements.com/product.php?id_product=737

If you  decide to buy it from them they also have the grey switch covers.  Just google the part number 20-9672 and you will find them at Marco, BAA, MAD even eGay

I too replaced mine but continue to have problems after awhile. Need to always recalibrate every few days