Qidi Q2 Side Spool Holder Support Leg (Fix for Rear Panel Flex)

Why this solution works better than reinforced holders

The stock side spool holder tends to flex under load. In my case, a 1.6 kg spool eventually tilted enough to fall off, ruining a print.

There are plenty of "reinforced" spool holders available that generally simply makes the original design thicker. However, after experimenting, I found that the holder itself isn't really the problem — the rear panel is.

Under load, the spool holder mounting area causes the entire rear panel to bend. No matter how rigid the holder is, it still lacks a solid support point and cannot remain perfectly level.

That's what led me to this design.

The idea is simple: provide a rigid support directly underneath the spool, transferring the load straight to the table\floor instead of twisting and bending the rear panel.

Design Features

• Fully compatible with the stock Qidi spool holder and locks securely into it.

• Does not increase the overall width, so it won't reduce the maximum spool size you can use.

• The vertical support is offset from the rear panel, allowing the load to act more vertically while also leaving space for a waste container on the left side.

• The base includes mounting holes for an extension platform (aka 'feet'), nessesary if you using some custom feets for your printer.

• Custom supports are included in the model. They are easy to remove, but can also be disabled if preferred.

Printing:

Orientation

The model was designed to be printed on its side, leaving more room on the build plate for other parts. The built-in supports make this orientation possible without enabling slicer-generated supports and are easy to remove.

Alternatively, you can remove the custom supports and print the model flat on the build plate. In this orientation there are very few overhangs, and some surfaces may come out cleaner.

Supports

• Vertical orientation
  No additional supports are required. The built-in supports work very well.
  I recommend adding a brim (about 5–7 mm) for extra peace of mind.

• Flat orientation
  Enable "Supports on build plate only" for the teeth section.

Removing the built-in supports
In OrcaSlicer, right-click the model and select: Split → To Parts
This allows you to remove the custom support bodies.

Material

The printer side panels can become fairly warm, so I recommend PETG, ABS, or ASA. I printed mine in ABS. PLA will probably work fine as well, but I haven't tested.

Additional Print Recommendations

Bridge settings
For reliable bridges, make sure bridge acceleration is set to no more than 1000 mm/s².

Strength
Because the load is transferred vertically, excessive strength is unnecessary.
I recommend:

• 3–4 walls/perimeters

• 0.6 mm internal wall width

• 4 top and bottom layers

• 10–15% grid infill (No need to waste filament).

Lifting Platform (feet)

If your printer sits on taller custom feets, you'll also need an extension platform for the spool support leg.

The platform and fix pins are provided as separate file.

Choosing the correct height

Measure the clearance between the table\floor and the bottom edge of the printer side panel.
Subtract 7.3 mm (the base height measured with my tools).
The result is the required platform height.

In your slicer:

1. Select the platform model.

2. Scale only the Z axis (disable uniform scaling) to the desired height.

3. The default platform height is 16 mm.

4. If you reduce the platform height, adjust the locating pins accordingly.

Printing

the Platform
Print the platform flat on the build plate.
Any material is suitable. High strength is unnecessary.
Recommended:10–15% infill

the Pins
Print the pins vertically with a sufficient brim.
The pins are only used for alignment and do not carry any load.

Assembly

Assemble the parts as shown in the photos.
Everything is designed to be a press fit, and glue is usually unnecessary.

If something doesn't fit:
Make sure seam artifacts have been cleaned up.
Verify that the platform height has been scaled correctly.

I hope this model proves useful.

If you run into any problems or have questions, feel free to ask — I'll be happy to help).