I remember seeing the discussion about updates here, so I thought to post as well. If there is a more relevant thread, feel free to move this accordingly.
We have been discussing some ideas in the Stiffening mod thread that involve the use of 40x40mm extrusion as a one piece X-axis. There is an easy update on the Y plates that would facilitate things (i.e. eliminate the need for drilling to mount a 40x40 extrusion). Here it goes :
There is a set of 4 holes (2 round guide holes and 2 slots) that are meant for currently mounting two pieces of MakerSlide. By extending the two slots by 2.65mm towards the two round holes, the same Y plates can accomodate either two pieces of MakerSlide or one piece of 40x40.