Among the clinics I attended at the recent the NERPM, the most expensive was the one presented by Ryan Mendell, "Machinist Tools For Modellng, Part 1 - Hand Tools." In just two days I have spent about $200 for five new tools and I have not purchased a Digital Caliper yet. Ryan runs the Machine Shops at the University of Toronto and is a Mechanical Engineer who started hanging around a machine shop at age 14. He also was selling a neat little Finger Sander he calls the "tight Spot Sander." Here is a link to the Demo video: https://nationalscalecar.com/product/tight-spot-sanders/

Regarding his presentation, it can be found here, but be careful with your credit card or PayPal account: http://grandtrunkrailway.blogspot.com/