Hi Chris,  Welcome to Team Titleist!  If you put a standard weight DYG shaft in an S300/X100 flex, you will increase the swingweight about 2.5 points.  If you put the R300 flex, it will increase it about 2 swingweights.

We have two 'go to' fitters in the Pittsburgh area:  Jerry Smith over at Tam O Shanter - (724) 981.3552 and Aaron Jaecks at Pine Creek - (412) 492-9990.  I spoke with Tam O Shanter and even though the weather is not great, if there is a break, they will do the fitting for you outside. Just give them a call and you can work it out with them.   I was not able to get through at Pine Creek, so they may be closed for the season, but again, if the weather breaks, they may be open.

wow Cathi thank you so much for the info!  i really appreciate and I'm hoping for that weather to break so I can get out there and get fitted!

If you are able to get out there soon, let us know how it goes!

Cathi,

Aaron from Pine Creek Golf.  If you ever have any other people looking for a fitting please give me a call on my cell phone I will call you with that info.  Thanks.

I special ordered my AP1 irons with KBS Tour stiff shafts and they are totally AWE...wait for it...SOME. 

I am sure the DG shafts will compliment these irons very well also...and by the way I am hitting more greens with these irons and my handicap went from 8.2 to 7.3 in two months due to much better iron play!!!