Karl Olsen gave a presentation to my fellow classmates and I at Michigan State last year, about all the changes and work he undertook at NGLA, I must say it was one of the best I had ever seen and got me interested in golf architecture. He's a great superintendent as well as a teacher, MSU sends him interns every year. I'm a little more familiar with Crystal Downs though, I believe is wasn't until the late 80's to early 90's that "the Downs" was brought to the light of the golf world, I'm sure Doak had a huge part in that. In fact CD uncovered a rare home video of the course in its early years that helped them "restore" CD to where it is now, a masterpiece, none of that can be said without giving credit to Mike Morris, CD's version of Karl Olsen. Mike actually gave a presentation on some of his recent bunker restoration (circa 97-98), and anyone can view it on the USGA's web page, uder the green section, via case studies, its a great presentation, I encourage everyone to look through it!!! I also know Crenshaw is a huge fan of the course, but who isn't I guess, I one of the biggest fans of the place