> For the complete documentation index, see [llms.txt](https://docs.wcproducts.com/welcome/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wcproducts.com/welcome/greyt/greyt-telescope/overview-and-features/tubing-hole-pattern.md).

# Tubing Hole Pattern

The holes in the bottom of the Base Tube and top of the Intermediate/Base Tubes are used to pin the Top Blocks and Gearbox to their respective tubes. The holes in the bottom of the Intermediate Tube are used to install the Bottom Blocks, Hardstops, and CF Springs to their respective tubes. The top of the output tube will be determined by the user. This is the recommended spot for the Telescope String to anchor to, as it is the easiest place to do so.

{% hint style="info" %}
Unless otherwise specified all holes are 0.196”, or clearance for #10-32 Bolts
{% endhint %}

<img src="/files/0zwMLf3CZaIrUm8q2pCE" alt="" width="563">

## Drilling Guides

{% hint style="info" %}
All of the Step files below are compatible with the WCP Press Fit Drill Bushings ([WCP-0321](https://wcproducts.com/products/bushings)).
{% endhint %}

The jigs below ensure perfectly aligned and positioned holes for the 1 to 4 stage tubes. Simply cut your desired tube to length, slide it into the jig, and drill out the necessary holes.

{% hint style="info" %}
We recommend installing a bolt after drilling the first hole to secure the tube and prevent misalignment.&#x20;
{% endhint %}

{% file src="/files/767Oh7B0XHyvFClLRk9Q" %}

{% file src="/files/Jg2QU5wbD55j7NEsP1ZL" %}

{% file src="/files/ukvtyFSz0XKxvEWoVI8P" %}

{% file src="/files/iCWEkTFzBDdgQvcRcMb1" %}

{% file src="/files/P4esrHxaZ4maSsbDwfZU" %}


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