## 3 Results  
The hose holder parametric clip systems were additively manufactured successfully through uPrint SE Plus (Stratasys, Eden Prairie, MN, USA) and Lulzbot Mini (Aleph Objects Inc., Loveland, CO, USA) in Aalto University and with uPrint SE Plus in pilot organization. Further, cyclone sampler holder clips were printed with uPrint SE Plus in both locations. The hose holder clip was printed with two different harness widths (25 and 30 mm) to prove that the parametric design functioned as planned. Figure 3 showcases both old traditional and new components along with assembled systems on a prototype harness. Firstly, Figure 3 shows four printed hose holder assemblies in the printing bed with support structures that display recommended printing orientation (a), and instructions on the way in which the slider should slide in the sheath when in the harness (b). Figure 3 also shows the assembled cyclone sampler holder with additively manufactured holder (d), and comparison of new ABS hose holder and traditional metal version, which was attached with green tape (c). Further, Figure 3 shows the blue hose holder clip, which was printed with low-cost 3D printer (f), and also the black hose holder and cyclone sampler holder clip, which were printed as part of supply chain testing in FIOH (e). Finally, Figure 3 demonstrates both the cyclone sampler and hose holder in practice, with the new prototype harness from the front (g) and back (h). The hose holder clips performed adequately in field tests. Zip-ties were used to ensure that no accidental dislocation would happen as the field tests were done in real life sampling situations where it is imperative that sampling is done correctly in one go. These zip-ties did not interfere with working of clips. The occupational specialist was satisfied with performance of the clips and speculated that  
Figure 3: (**a**) Five hose holders with support structures in the printing bed; (**b**) sliding the slider into the sheath; (**c**) new (white) and old hose holder (green and metal original cyclone sampler assembly); (**d**) cyclone sampler assembly with the redesigned holder; (**e**) black hose holder clip and cyclone sampler clip printed as part of supply chain testing; (**f**) blue hose holder clip printed with Lulzbot Mini; (**g**) sampler system with cyclone sampler clip from the front; (**h**) harness with sampler system from the back. when they get used to using clips, the zip-ties might be unnecessary. All the clips performed well in the active measuring situation. After the first field test, one of the hose holder clip's prongs were broken during transportation in a bag, presumably because something heavy was placed on top of it. After the third test, one of the hose holder clip's \"prongs\" broke during removal of the hose. All other clips were a whole and no visible cracks were observed. The cyclone sampler holder clip test was also successful. The occupational specialist noted that the cyclone sampler clip's hold had been very secure. After the field tests, the occupational specialist's comments about the clips were enthusiastic and several suggestions of future work were mentioned such as longer hose holder, double hose holder, and parametric markings to the clips to express which width and thickness they are meant to have. Reinforcing of the hose holder clip's \"prongs\" was also suggested including changing the material to a more flexible one. The supply chain tests showed that a person with no background in AM or experience in CAD designs can change an open source parametric model and generate the needed model with only links and basic written instructions. The occupational specialist had slight problems with FreeCAD, which were already known and are described in Appendix A. Upon following the instructions described in Appendix A, the user was able conveniently solve the Kernel related problems of the open source software.