Cut up some of the 100x50x4 rectangular section steel to make a temporary gantry and just placed it on the x axis rails to check I cut it to the correct length!

Apologies for the blurred photo, took it on my phone...

Click image for larger version.  Name: Cut_Temp_Gantry.JPG  Views: 561  Size: 357.1 KB  ID: 11552

Close up of the steel...fresh off the bandsaw so still got swarf and cutting coolant.

Click image for larger version.  Name: Cut_Temp_Gantry_1.JPG  Views: 566  Size: 393.6 KB  ID: 11551

I'll hopefully weld up the two pieces tomorrow and drill the mounting holes for the 20mm carriages in the 200mm long bits. I'm thinking of bolting the L shaped gantry to the 200mm pieces and then once it's square I'll stitch weld them to keep them square. Going to epoxy the face of the gantry for the rails and also the bottom of the 200mm pieces so the carriages sit flush unless by some miracle the steel is perfectly flat...

Had a delivery of some cap head bolts last week, I know I'll need more and different sizes but this should get me going!

Click image for larger version.  Name: Cap_head_bolts.jpg  Views: 531  Size: 397.6 KB  ID: 11553