Hello

[m.marino]

If I understand the drawing correctly, you are looking at this being 2m by 800mm in overall dimensions. That might be a little wide for a single central ballscrew, as racking of the gantry can start to be a problem there. I see a good bit of reinforcement built in, but you might want to look at adding some along the Y axis direction as well to help decrease racking of the frame possibilities. I don't know that seller on ebay as I dealt with Chai of linearmotionbearings also out of China. That is about all I feel able to mention on and I am sure those with more knowledge will pipe up shortly.

Michael