# FAQ Mechanical ### What is the difference between Release 1 and Release 3? Release 1 is the first version of the headset which leap motion open sourced in 2018. Since then there have been multiple revisions to make the headset stronger, easier to print, and more comfortable. For a detailed writeup of the changes made in release 3, check out the [Release 3 Documentation](/project-north-star/mechanical/release-3.md). ### What connection does the leap motion controller use? My kit only came with a usb micro-b cable? The leap motion was designed to be able to support usb 3.0, however it currently only utilizes usb 2.0. This means you can use a standard usb micro-b connection with the sensor, which is useful for integrating it into smaller form factors, like an hmd. ![](https://cdn.discordapp.com/attachments/456857707815763983/714808471828037652/X5LE6nmkJTndipUFKgOj9AvnZYkCN0PRI-AQQFaEko4WfoCCrdwE9FeEtCRZFB_4o7axNi9VbpYvp1yQhzf4NaO9novMIR3XP-am.png) ### Will the optics bracket fit on the Ender 3 Printer? Yes! The optics bracket will fit, you may have to rotate it a bit to fit properly on the build plate, here's a screenshot for reference. You can see as noted in the image that the dimensions of the optics bracket with a roughly 22 degree offset are (X:224.14mm , Y: 140.51mm, Z: 101.03mm). ![](/files/-MF30XMeulbBz0lG0nkW) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.projectnorthstar.org/project-north-star/mechanical/faq-mechanical.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.