> 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/applications/mounting/external-string.md).

# External String

{% hint style="success" %}
Vibra-TITE VC-3 Threadmate ([Vibra-TITE](https://wcproducts.com/products/threadlocker)) is recommended on all bolts that thread into a tapped hole.
{% endhint %}

## Nutstrip Installation

For this mounting example, you will need 2 Aluminum Nutstrips cut to 3”. For one of the nuststrips, drill out the two holes marked in green to #9. 

{% tabs %}
{% tab title="1-1/2" Base Tube" %}
For this mounting example, you will need 2 Aluminum Nutstrips cut to 3”. For one of the nuststrips, drill out the two holes marked in green to #9. Remove the two #10-32 x 3”L bolts indicated in the image below. Drill out the corresponding tapped holes on the Gearbox Plate clearance for #10-32 bolts. Install the nutstrips as shown in the image below using the indicated bolts.

![](/files/q8ixJo5kQTaHgX0xRDgi)
{% endtab %}

{% tab title="2" Base Tube" %}
For this mounting example, you will need 2 Aluminum Nutstrips cut to 3”. For one of the nuststrips, drill out the two holes marked in green to #9. Remove the two #10-32 x 3-1/2”L bolts indicated in the image below. Drill out the corresponding tapped holes on the Gearbox Plate clearance for #10-32 bolts. Install the nutstrips as shown in the image below using the indicated bolts.

![](/files/44DatjO9hMDp5GhmhEGM)
{% endtab %}

{% tab title="2-1/2" Base Tube" %}
For this mounting example, you will need 2 Aluminum Nutstrips cut to 3”. For one of the nuststrips, drill out the two holes marked in green to #9. Remove the two #10-32 x 4”L bolts indicated in the image below. Drill out the corresponding tapped holes on the Gearbox Plate clearance for #10-32 bolts. Install the nutstrips as shown in the image below using the indicated bolts.

![](/files/ckgeETNYeN18cR83KtQq)
{% endtab %}

{% tab title="3" Base Tube" %}
For this mounting example, you will need 2 Aluminum Nutstrips cut to 3”. For one of the nuststrips, drill out the two holes marked in green to #9. Remove the two #10-32 x 4-1/2

”L bolts indicated in the image below. Drill out the corresponding tapped holes on the Gearbox Plate clearance for #10-32 bolts. Install the nutstrips as shown in the image below using the indicated bolts.

![](/files/4HnRzng9yMnOQqM6yJDA)
{% endtab %}
{% endtabs %}

## Mounting Pattern

This hole pattern is for the standard mounting style for the Non-Flipped GreyT Telescopes. The table below shows the dimensions that change between the different base tube sizes.

| **Base Tube Size** | **Dimension A** |
| ------------------ | --------------- |
| 1-12"              | 2-1/2"          |
| 2"                 | 3"              |
| 2-1/2"             | 3-1/2"          |
| 3"                 | 4"              |

![](/files/Sck9JGZ0Lcj2N1YJrJJG)

## Mounting Example

The hole patterns for the individual nutstrips will line up with the scores on the VersaFrame Tube. The distance between the holes will be the same as indicated in the previous section labeled Mounting Pattern. Drill the holes using a #9 drill bit.

Bolt the Flipped GreyT Telescope to the tubing using six #10-32 x 1-1/2"L bolts.

![](/files/ZbFuECfKH4Kdila4Z6QT)


---

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