My version doesn't block the slidingbock and is scaled to 53.75mm fitting the height we need
Same instructions as in the original version of this thing:
"Make the height of this 1 to 2mm less than where your limit switch is set. The STL is 50.5mm from where it sits in the platform to the top. Scale the STL in Z to adjust for height. The underneath part won't change much with this scaling so don't worry about it. Alternatively you can adjust the Sketchup file and output a new STL."