A big difference in how the two shafts setup. The 90 gram lite will play softer than stiff and has a low kick-point, so alot more release and action, so easier to bend and swing because of its weight. The Dygold is a high kick-point, heavy shaft which relates to a low ball flight and plays stiff, so harder to bend and very accurate because you get less spin and action. Add in the less loft scenario and the differences will be apparent in the ball flight and carry distances. To me your fitter has missed the mark in acouple of areas, one being the shaft weight and kick-point, the other being the set-up of the irons versus your old gear.
OEM specs can also vary + or - and more often than not they aren't on the money. Your AP1 could be 30/62 and the Rac could be 34 degrees, making them totally different 7 irons.
Making a change in equipment should be for the future and how it will help the player go forward and improve via better components. Head design, shaft, flex, shaft weight, kp, length, lie/loft, grip, grip size and swing weight are several areas that all have to be looked at, to help optimize clubs so that the gains are to move forward and not stagnate.
Middle of the road changes often bring the best results and to go from one end of the scale to the opposite side usually adds a longer time frame process to marry the player with new equipment.
Maybe a shaft that has a mid kp at 110 grams in stiff or medium stiff would have been an interesting test for you and then the less loft might have worked a treat.
New gear should last you atleast 3 to 5 years and be fitted with that in mind as a minimum !
I did all of it at The Golf School at Palm Meadows on the gold coast.
Shaft fitting was with Pete Harrington, he did irons and driver, then I did club selection with Matt. All completed using range and trackman.
Never tried any other Iron shaft.
It was the same one used to select irons. AP1s by far most consistent, forgiving and thus accurate for me. Yes, lower spin too than the others tested.
130gram shaft was recommended to help me control tempo.
Clubhead swing speed with 7 iron was showing up around 85 mph + / - a few mph each swing.
I'd only heard good things about Pete and Matt, and am confident they have it correct for me...
My swing is the bigger issue!
I appreciate your input. Thanks.
Open to thoughts and ideas.