I have this on my 06 Cayman S and it works beautifully- very direct and connected, precise feeling.
Not sure what the difference is on the 986 vs 987. The 987 had some plastic internals that this unit replaces with sturdier metal ones.
just saw your post- kinda late.
Go to odometergears.com they sell a replacement better then OE and ships in a couple of days
They have a video to walk you through the replacement.
I did it – took me about an hour