That ER collet adaptor would be a great option for anyone with a mill with MT spindle. I owned mine long before I heard about ebay, long before ebay started. The machines were well made, designed to be a bench corner relief mill for jobs that didn't need the larger mills I believe. When they were made there weren't many people who could afford a home shop equipped like we have now I think. I know in 1959 when I was 10 my dad sure couldn't afford it. In a way we are very blessed.