Best if you post them here, give other folks a chance too. Someday if I finish the 10 high priority projects my wife has me working on at the same time I'll take a shot at 3D printing.
I've attached a zip file with the actual FreeCad file. The three parts, "slide", "pusher", "correcting" are all in the one file and a print file, usually an STL file (in my limited experience) can be produced for each one individually. It is a FCstd file specifically for FreeCad but may be readable and usable in other CAD programs.
I've also included a screen shot of the "spreadsheet" that allows each piece to be custom sized by changing the values. That feature might not be compatible with other CAD programs.
I've also attached a copy of the WSM page the describes the parts and usage, even though that may be obvious to some. This is specific to the B21 backhoe (BT751) but should be adaptable to most.