These are clubs that can save you a few strokes a round and even subtle changes in design can make a big difference in performance. Certainly, going to demo them would be suggested.

If your swing or playing conditions haven't changed... then likely not necessary. However, unless you have tried all of the grinds, then there may be room for improvement on one or more clubs with a fitting or by attending a demo day.

Similar situation here. I'm currently gaming SM7s that I was fitting for. I have a fitting scheduled this afternoon. Curious if my grind or lofts will change, I'm assuming my shafts will change and be more similar to my iron fitting.

If it's available to you, I always lean in the direction of getting fitted, you just never know and a second set of eyes and ideas is always helpful.

Get fit. Some things could have changed,grinds,bounce,etc.

As a follow up, my fitting went well. Glad I did, as we changed the gapping, previously had a 54 and 58 to a 54 and 60 to “slow me down” around the green and to keep the gaps more consistent from the 43 and 48 T200 to the Vokeys.

Shafts stayed the same Project X 6.5, lie angles went up. He bent my current ones up a bit for me to help out while I wait for the SM9s.

Agree with Brock, depends on swing/play condition changes. I moved from the Northeast to Texas so had to change the grind on my wedges significantly when I just got fitted for SM9s.

Hope you enjoy the SM9s! I think they are fantastic and sound a little more pure/less clicky than the older Vokeys. (Please don't take that "clicky" term personally as I actually enjoyed the sound).