You're welcome...If anyone has any ideas on improvements, please let me know...I am a firm believer that any improvement in the process will ultimately result in improvements in the end result.
To provide a little background, I developed the "Bic pen" idea, because most of the other ideas that are out there use larger diameter tubes (either commercially available plastic tubes, or home-made PVC tubes)...Being someone that is a hobbyist, and not a production cutter, I don't go through the amount of blades that these higher diameter systems can hold...I needed something that could hold a variety of different sized blades, but in lower quantities...It's amazing what comes to mind when you're walking around a store thinking of an idea, while looking for something that can fit the bill...I often find myself in these situations, where I have an idea of what I want, but there is no commercial product that will completely match the idea...So, the obvious option is to try to find a commercially available product that can be modified to meet the needs of the idea.