Diamana plus whiteboard in 913d2 driver

Trying to get feedback if the diamana whiteboard plus in a stiff shaft is right for me.  Just recently was put on a launch monitor with a stock stiff diamana plus with 10.5 913 D2.   Felt really good.  Clubhead speed was 108 on average.  launch 11 degrees and spin around 3100.      Play right now a matrix 7M3 Black tie in an X Flex.  Don't like the feeling of a 2X4 in my hand.  Wanting to know if this shaft would be too weak?  Was looking on the shaft chart and was not sure if the whiteboard plus vs whiteboard play any different.  Any thoughts?

the spin rate is a little high. Typically in a driver your lookin for around 2400rpm. The white board has a low ball flight (it might be the lowest stock shaft) becuase its pretty stiff and has a high kick point so the regular stiff might be a little to weak for you if your getting that high of a spin rate. However, going up to an X flex in the same shaft might not be the best option. Keep in mind that not all "Stiffs" and "X-Stiffs" are created equal. You may need a higher launching, higher spinning X flex for the optimal ball flight.

See below, as it is from the description on the Titleist shaft chart.

Mitsubishi Diamana +Plus Series shafts combine the premium materials of Original Diamana with the MDI technology of Gen2 Diamana to deliver the great feel of Original and the stability of Gen2. In the D+ White 72, this provides firm feel with lower launch/spin.