Looking at the second prototype, we were more strict in regards to the dimensioning of the original shell. We tried to closely adhere to how the case was made by Tipeye, and this showed when we compared the second case to the pen. It fit much better, and we were even able to screw it into the pen. Moving further from the second prototype, we saw this previous grip case fit much better, it still did not completely cover the interior elements of the pen, so we revised the case for a third and final time, and carefully traced our model to match up with the Tipeye case, and we also put more pronounced grooves so that the user had a noticeable change in ability to grip the pen

 

 

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