Hope you don't mind but I thought I'd offer these charts here to this group of power users, also posted to scan hi-end users group.
I have a lot of charts that I will just not use. No longer necessary as I don't scan film, and sold my ICG some time ago.
The best charts are these;
HCT PRecision Scanner Targets All sold.
Fuji 35 mm # 6573 Price new around 150$
Fuji 4x5 hand measured #4427 new around 480$
More or less standard charts:
A Wolf Faust kit with 4 35mm transparencies and 1 Reflective 5x7" value around 85$
Ektachrome
Velvia 100, Provia, Astia
Velvia 50
Sensia Astia 100
5x7" Kodak Pro reflective
Wolf Faust hand measured 4x5 Velvia 100, Provia, or Astia value around 75$
I also have some Kodak IT8 7/1 R1 charts, reflective , one hand measured, and one Ektachrome 4x5 transparency
All in pristine condition and all txt files supplied. Reasonable offers payment by Paypal.