I need work done on my irons and wedges
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At one inch, I'd get the set redone if you're a serious player.
$29 is a decent price for all of that - I assume the shaft is the typical DGS300. I would also have them adjust loft while adjusting lie.
However, and there is always a "however," you may not get the consistency you want in terms of specs between clubs by the typical OEM. They generally do not spine/flo or go for frequency consistency between shafts, and do not give you a large choice of shafts.
If you are keeping those irons and playing competitively, I would go to a reputable professional club maker for a fitting, shaft selection, and rebuild. You will, however, pay more than $29 for a professional club maker to get a quality rebuild.
Oh, yes, they are excellent clubs, but that does not mean they do excellent club work. You want consistent shaft frequencies, and typically, that is really tough to do w DG shafts, which are weight sorted. Frequencies can be all over the place and frequently are all over the place. Also, adjusting the lie affects the loft so one must always check both to make certain they are correct. Also, have you had grip size checked? I was surprised to learn I needed two wraps - thought my hands were fairly normal, and grip has a big effect on swing.
The short answer is that if you want it done to exacting standards, you need a real professional.
Check this guy out as an example. He is a perfectionist. Just north of Boston, not inexpensive, but he gives you great work and will do it by mail. Lots of forum guys use him.
It's possible to match shaft frequencies with DG, but someone would have to go through a batch of them to locate eight which were pretty close to the same frequency.
One custom club guy said he would start with 12 DG initially, and then select the eight which were closest on frequency match. (If frequency differences were really high, he would test more shafts to try to get closer). I'm not sure what his "quality control" cutoff was for close on frequency match.