Honestly, it's a shame that this RD is notorious for being delicate. I have a SP variant and it's provided me with some of the most smooth shifting I've ever experienced. I've put a total of 100km on it since recieving it from a previous mid 80s Miyata 1000 that likely had put ten times the amount. It still worked fine.

Due to the concern, I switched it for a a Suntour ARx RD on my 1000. It's more of a display RD since it's unique and sought after in some cases.

if yours is in good condition, keep it that way abd for display it's quirky.