great idea, would love to see it. Have not heard of any more than you mention. Wish you would write an article and publish about your display. Wonder what serial no. Hollenbecks you have. Numbered sequentially as you probably know. I have 2 Hollenbeck Drillings now, no. 35 passed down in my family (see thread Hollenbeck Drilling and German insert) and no. 236 just purchased from Cherry's, they have several more on consignment. Good luck