Top-Mounted Spool Adapter for TPU Printing (Qidi Q2)

No original parts need to be modified or replaced—the stock spool holder extension is reused.

The adapter mounts on the side, so it does not interfere with sliding the top glass panel backward.

You can even keep two spool positions installed simultaneously: one on the side and one on top.

Custom supports for the internal overhangs make post-processing much easier.

What You'll Need To use this setup:

1. Print Spool_Holder_Support_Leg: https://www.printables.com/model/1755689-qidi-q2-side-spool-holder-support-leg-fix-for-rear
   

2. Print Top_Holder_Base from this model and attach it to the Spool_Holder_Support_Leg.
   

3. Choose the appropriate Top_Holder_Extender (from this model) depending on the height of your riser (i made a note how to choose below).
   

4. Optionally install the PTFE tube guide (from this model). It works the same way as the original guide on the stock adapter—you can either transfer the original part or install a new one. It is secured with a self-tapping screw.
   

Using the Setup

Whenever you want to print TPU:

• Move the spool holder from the side to the top (or simply print a second holder and leave it installed permanently).

• Remove the top glass panel.

• Load the filament into the print-head.

You have two options:

• Remove the PTFE tube from the print-head and feed the filament directly from the spool.

• Or install a dedicated PTFE tube running from the spool to the print head.

Note:
The adapter base extends approximately 4 mm beyond the original holder to improve rigidity. Because of this, very wide spools (approximately 780 mm or wider) may not allow the stock locking cap to fully engage. If needed, you can print the extended spool holder available here: https://www.printables.com/model/1766219-q2-basic-spool-holder-with-custom-supports-and-len

How to choose Top_Holder_Extender part:
I made several parts for the most popular riser models choose whatever you use.

• no riser: use top_holder_no_raizer.

• Qidi Q2 60mm Riser Top-Hat by BlueTip, use top_holder_for_raizer_60mm

• Slightly Taller Qidi Q2 Riser by wanderyr, use top_holder_for_raizer_49.7mm

• Qidi Q2 Riser by Lami, use top_holder_for_raizer_45mm

• QiDi Q2 Riser by Studio 507, use top_holder_for_raizer_33mm

• QIDI Q2 LID RISER by Sunny Barlow, use top_holder_for_raizer_30mm

Printing Recommendations

Print all parts on their sides, exactly as oriented in the supplied files.
Recommended materials: PETG / ABS / ASA, PLA will probably work as well.

Recommended settings:

• 4 perimeters

• 4 top/bottom layers

• 10–15% infill

For the best dimensional accuracy, use either Outer → Inner or Converging perimeter order.

  Supports

You can disable the integrated custom supports by choosing Split → To Parts (in OrcaSlicer). Then hold Alt, select any support body, and delete it if desired.

   Top Holder Base
Requires supports beneath the lower overhanging section (see screenshots).

Alternatively, you can print it flat on the build plate after removing all custom supports, but you'll then need supports for the mounting interface.

The integrated support beneath the angled section can be somewhat difficult to remove, but I wasn't able to eliminate warping and surface defects without it. If your support settings are well tuned, feel free to disable it and use your own supports instead.

   Top Holder Extender
Print on its side as supplied.
The integrated custom supports remove easily, and no additional supports are required.

   PTFE Tube Guide
Print standing on its edge as oriented in the model.
Only a few small supports are required and they remove easily.

Before assembly, make sure all supports have been completely removed from the mating surfaces so the parts fit together properly.

If you find this design useful, I'd really appreciate your ratings and comments. Thank you for your support!