1. If you're using a printer with 10 mm rods (X-Max, X-Plus and some I-Mate(s) printers) and stock bearings you should print this:

xplus-xmax-10mm-rods/icarus-2.1-normal.stl


2. If you're using a printer with 10 mm rods (X-Max, X-Plus and some I-Mate(s) printers) but have installed wider single aftermarket LMUW10 bearings print this:

special-bearings-xplus-xmax-10mm-rods/icarus-2.1-LMUW10-normal.stl


3. If you're using a printer with 8 mm rods (most newer I-Mate(s) printers) and stock bearings you should print this:

imate-imates-xmaker-8mm-rods/icarus-2.1-normal-8mm.stl


4. If you're using a printer with 8 mm rods (most newer I-Mate(s) printers) but have installed more commonly used aftermarket LM8UU bearings print this:

special-bearings-imate-imates-xmaker-8mm-rods/icarus-2.1-LM8UU-normal.stl


5. If you're using a printer with 8 mm rods (most newer I-Mate(s) printers) but have installed wider single aftermarket LMUW8 bearings print this:

special-bearings-imate-imates-xmaker-8mm-rods/icarus-2.1-LMUW8-normal.stl


6. Normal, narrow or wide version? The normal version of each type fits 95% of printers perfectly if you have dialed in flow correctly before printing the carriage. The narrow version has a little less clearance for the bearings (small bearings) and the wide version has a little more (for larger than specs bearings or polymer (IGUS) bearings). I recommend printing my Flow Calibration Cube to dial in flow before you start printing the carriage:

https://www.printables.com/model/81314-flow-calibration-cube


7. Standard or Superleggera version? Standard should be used unless you no longer use the standard Qidi PCB. Superleggera is a special ultra lightweight version without ribbon cable holder and PCB holder, it should only be used if you have relocated the PCB and use an umbilical cord or don't use the PCB at all. If this just sounds confusing to you, go with the standard version.


8. Standard of Dual 5015 version? If you want to use dual 5015 blower fans to maximize parts cooling (if you print a lot of PLA for example) that version can be beneficial. Normal Icarus is suitable for most people.