For future reference here is a cheap, easy and clean way to add enough features for a great scan alignment. Another solution one can use is crumpled fabrics, specially when scanning car features with the range
Scan made with the mini, fuse 0.2 mm and mesh quality 6, no post processing, not only the resulting mesh is clean and smooth but one can clearly see the tape thickness used to keep the broken part together
Other similar and usefull techniques are listed in these videos:
Markers, No Markers, DIY Markers… Tips for 3D Scanning.