diff --git a/docs/machines/LargeFormatCNCRouter.md b/docs/machines/LargeFormatCNCRouter.md
index bda34f6230813417417b9b9942529e733ce073a2..a4cc775cb2e8b59ed9d94f9c69db11e41d30dbf4 100644
--- a/docs/machines/LargeFormatCNCRouter.md
+++ b/docs/machines/LargeFormatCNCRouter.md
@@ -1 +1,13 @@
-# Large Format CNC Router
\ No newline at end of file
+# Large Format CNC Router
+
+1) [PrintNC](https://wiki.printnc.info/en/home) Large CNC Router - Fully Open Source CNC Router build with great Wiki having full assembly instructions
+- Complete BOM, CAD and instructions to build.
+![PrintNC Picture](https://wiki.printnc.info/printnc-v3.png)
+Specifications:
+- Cutting Area: 1000 mm x 600 mm (Build size can customized)
+- Materials: Can cut Wood, plastics and Aluminium
+- Linear Motion: Ballscrews with BFBK bearing mounts
+- VFD water cooled spindle
+- GRBL 
+
+2) 
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diff --git a/docs/mechanics/Ball Screws.md b/docs/mechanics/Ball Screws.md
index c9bb2ad5c550920488b7459b6cf79077f2079e24..e3c669f8954b08e4a098e9daf61c31c409094d32 100644
--- a/docs/mechanics/Ball Screws.md	
+++ b/docs/mechanics/Ball Screws.md	
@@ -36,4 +36,6 @@ There are several disadvantages.
 
 For your particular application, you need to evaluate the tradeoffs. Either could be your answer. If the analysis is too complex, you could default to belt drive. You could put the money you would have spent on ball screws, ball nuts, and extra bearings into wider belts, higher torque motors with smaller step angles, and better (higher voltage, faster switching) motor drives.
 
+- There are two types of ball screws- rolled and ground. The cheap chinese ones are the rolled ones and specs won't be as good as the ground screws. 
+- 
 [Information](https://www.machinedesign.com/mechanical-motion-systems/linear-motion/article/21828146/the-importance-of-ballscrew-end-fixity) on fixing methods of ball screw ends and their importance
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diff --git a/docs/mechanics/Lead Screws.md b/docs/mechanics/Lead Screws.md
new file mode 100644
index 0000000000000000000000000000000000000000..fb36ff32c92cbb183e89aeccb151b8f3ecfa75c3
--- /dev/null
+++ b/docs/mechanics/Lead Screws.md	
@@ -0,0 +1,3 @@
+# Home
+
+[Information](https://www.designworldonline.com/how-to-correctly-apply-lead-screws/) on choosing Lead Screws
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diff --git a/docs/mechanics/Linear Motion.md b/docs/mechanics/Linear Motion.md
index 291ca3867f1b383d63519e99b8499cf9942d8836..071791ee67515f4131f7442a28b9c0c010dc49ce 100644
--- a/docs/mechanics/Linear Motion.md	
+++ b/docs/mechanics/Linear Motion.md	
@@ -1 +1,3 @@
 # Home
+
+[Build Your CNC](https://www.buildyourcnc.com/CNCMachineMechanicalParts.aspx) website has much information of the various components required for creating linear motion in CNC machines along with their properties and costs. 
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diff --git a/docs/mechanics/Linear rails.md b/docs/mechanics/Linear rails.md
index 291ca3867f1b383d63519e99b8499cf9942d8836..29717e35925225d013ac6f3b30681d3b0790854c 100644
--- a/docs/mechanics/Linear rails.md	
+++ b/docs/mechanics/Linear rails.md	
@@ -1 +1,3 @@
 # Home
+
+[Comparing](https://www.designworldonline.com/how-do-miniature-profiled-rail-guides-compare-to-their-full-size-counterparts/) miniature linear rails (15mm) with standard sized linear rails
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