I am currently designing a new frame for the bigbox consisting of 3030 extrusion. I want to reuse as much as possible whilst maintaining the ability to upgrade to a bigger bed later on (300x300). The issue is that I have to increase the depth of the frame by around 70mm which means the Y-Rods are too short. However, I will also use this opportunity to move to Greg's new IDEX linear slide design so I can substitute to the Y-Rods with cut down to size X-Rods. My problem is 8mm rods at around 440mm long worries me, it could be nothing but I am imagining all sorts of flex at that length! Does anyone have any input, are there any printers currently out there with this type of arrangement?