## 4 Conclusions  
This study addresses a gap in the literature related to the specific technological approach of manufacturing holds using Large Format Additive Manufacturing (LFAM) combined with milling, where surface quality or roughness is crucial for successful product development. As previously mentioned, there is limited literature in this specific field. Therefore, the authors provide a comprehensive review of existing studies, covering various aspects such as surface treatments, coatings, durability, dimensional accuracy, and material selection. This review, along with examples of industrial applications, highlights the reliability of this manufacturing method for industries such as the energy, aerospace, and maritime industries.  
Through two distinct experiments, optimal printing conditions for ASA 20 wt.% carbon fiber (CF) material were identified, focusing on key variables: temperature and the extrusion multiplier. The results of this research demonstrate that 260 \({}^{\circ}\)C and an extrusion multiplier of 0.172% should be chosen to reduce macro-defects such as warping, cracking, and dimensional inaccuracies and to minimize internal micro-defects like pores and cracks. These defects were quantified to facilitate further decision-making. Additionally, a 4 mm distance to the perimeter was identified as a key parameter, establishing 4 mm as the optimal distance for the analyzed conditions. After selecting the appropriate temperature and extrusion multiplier, a second experiment was conducted to identify key process parameters influencing the lowest arithmetic mean roughness values for the milled surfaces. The results indicate that a milling speed of 477.70 mm/min, combined with both conventional and climbing milling strategies, is the optimal condition evaluated.  
To conclude, a specific case study of mold development was presented. In this case, the mold was developed using the conditions defined in this research. This mold achieved a specified range of surface roughness of 0.762-1.524 \(\upmu\)m as defined in the product specifications. According to this research, these Ra values can be achieved with milling speeds ranging from 319 to 545 mm/min for up milling and 375 to 700 mm/min for down milling, process parameters that can significantly accelerate the milling process, leading to a reduction in production times and costs.  
Figure 7: Pictures of the mold’s production (on the (**left**)) and final mold (on the (**right**)).  
**Author Contributions:** Conceptualization, D.M.N. and F.J.P.M.; Methodology, D.M.N., F.J.P.M. and D.M.S.; Validation, D.M.N.; Investigation, F.J.P.M., J.R.V. and P.B.P.; Resources, J.R.V. and P.B.P.; Data curation, J.R.V. and D.M.S.; Writing--original draft, J.R.V.; Writing--review & editing, D.M.N. and S.I.M.; Supervision, S.I.M. All authors have read and agreed to the published version of the manuscript.  
This research received no external funding.  
Not applicable.  
The original contributions presented in this study are included in the article. Further inquiries can be directed to the corresponding author.  
The authors would like to thank the Junta de Andalucia's (INNANOMAT TEP-946 PAI and ENGINEERING AND MATERIALS TECHNOGIES FOR MANUFACTURING TEP-027 PAI) research groups from Cadiz University.  
The authors declare that they have no known competing financial interests.