I have had several practice runs making sections and threading. It was time to just try a full pen. What a learning curve. I got so tired of working on the same pen I gave up trying a clip. Maybe next time. The pen shape isn't the best and the section to body is not exactly a flush fit, but close. This is a #5 Bock. Hours and hours of reading IAP information was very helpful and purchasing parts from IAP vendors was also very helpful. Next pen I need to figure out how to make a closed end mandrel or purchase one that can fit custom pens. Any coments or advice is welcomed. Thanks