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# Moving the Horizontal Treadle stop Bar
The official position of Louët is that physical modifications to the Louët David 3 are neither necessary nor recommended.
A YouTube video is currently circulating that suggests drilling new holes in the loom and relocating the horizontal lower treadle stop bar. We strongly advise against making these modifications.
The issue shown in the video is a *split shed*. A split shed occurs when the upper shed is uneven, causing some upper warp threads to sit at different heights than others. The image below shows an example of a clean, properly adjusted David 3 shed.
If your loom is not producing a clean shed like this, the correct solution is to adjust the shaft heights. Proper shaft adjustment is the only recommended method for achieving a large, clean shed on a David 3.
Before making any shaft height adjustments:
* All shafts must be tied to at least one treadle
* The treadles should be tied using the last usable hole of the Texsolv tie-up cord
If you do not begin with this setup, you will not achieve the maximum possible shed.
We recommend beginning with a simple tabby (plain weave) tie-up:
* One treadle tied to shafts 1, 3, 5, and 7
* One treadle tied to shafts 2, 4, 6, and 8
Once tied up:
* Shaft 1 should be adjusted to 8 cm below the bottom of the castle on both the left and right sides
* Shaft 8 should be adjusted to 6 cm below the bottom of the castle on both sides
The remaining shafts should slope evenly between shafts 1 and 8. Any remaining shed unevenness can typically be corrected by fine-tuning the height progression of shafts 2 through 7.
For additional clarification and a visual demonstration of this process, please refer to the video available below.
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