RatRig VCore 4 - Machined XY Joiners

VCore4.1 Update: The joiners work just fine with VCore 4.1, including the 18mm steel bar.  There is a spacer that can be printed, or you can use the steel spacers that ratrig includes with the upgrade kit. The only issue if you are using the Ratrig 4.1 carriage.  They raised the endstops 2mm, so we now have taller 12mm middle plates for our joiners.  We have the 12mm middle plates available for purchase separately, but all of the XY Joiner kits going forward have the 12mm middle plates included. The Machined XY Joiners have been designed with adjustability and flexibility in mind.  Tested with both extrusion and Titanium Tube for the gantry, these Joiners should serve your needs nicely. Made out of 6061-T6 aluminum, they are study, well made, and lighter than the stock joiners at 112g per side. Instructions are available for download. Many thanks to the beta testers for this product which include @Xulkal, @arvidj01, and @Ross13 on Discord.  They were instrumental in testing and making