Convertible top slams when closing

[cinellipro]

This question has been asked in some variation in the past, but no one has provided a definitive resolution.

When closing the top, the rear window section slams shut. Not slams where it would crack the window, just worryingly slams. No other issues going up or down. A couple of months back the hydraulic motor was replaced at the dealer (warrantied).

My question is can the speed or rate of closure be adjusted or slowed down a bit?

I've read it could be the shocks that need replacing, but we're talking about the last moment where the top hits the deck, and to me sounds like a speed regulation issue rather than a shock issue. I'm probably wrong.

Anyone found a resolution to this.
Cheers.