Summary

This is untested.
Image only for flaring example

As this is a flare press tool, it will need to withstand some vertical pressure. for use on really thin and soft materials you can use less infill.
But for metal sheets over 1mm i would reccomend a high infill.

Print Settings

Printer Brand:

FlashForge

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Finder</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>high</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>High 50-100%</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Instructions:rnUse a hole saw or hole punch to make a 20~25mm hole in your sheet.rnplace the sheet between the dyes and apply force to bend the sheet metal.rnDo not use a hammer for applying force. Use something with a smooth consistant movement like a hydraulic handpress, drillpress, vice grips or for softer metals you could try standing on top of it. ect.rnrn</p></div>

30mm Flare press tool for soft metal/plastic sheets (UNTESTED)