Only 20 sets in the 1.5 hours that I had to peruse (due to family stuff). As you can see from the pics, the clubs in the bottom 80% of the pile were nearly impossible to view or extract.
But of the clubs in the top 20% of the layering, there are a lot of ones with poor characteristics. The worst quality that is tough to fix are ones with clubheads that are just too light. Adding a little lead tape is acceptable, but some of these are in the B range of swing weights and you'd have to add so much lead to them that it would really change the character of the club. Some of them have leading edges that are diggy and you'd have to increase the loft a lot to get the sole to be neutral bounce... but then you'd have a spade mashie shape with a mashie niblick loft, which isn't a great outcome. With others, the quality of the clubhead just wouldn't make sense with the amt of labor that you'd have to invest to restore the club.
But these hand made clubs varied a lot. For instance, you could have 2 separate George Nicoll Recorder 4 irons that look very similar, but one will be a perfect swing weight and the other will be significantly lighter. So it helps to have a swing weight scale and a measuring tape... or really good feel.
Based on what Tom has said about Sedge, it's not going to be an easy course, despite it's shorter length. However, if any stud scratch players do happen to find it too easy, they can grab one of these sets from Clark and the course will quickly seem terrifying.