'3D Studio MAX'
49) Use Inset tool again:
50) And finish it with a negative bevel.
51) The base structure of this object is done, we just have to smooth some edges. Same process, select this edges:
52) And chamfer them:
53) Select this edges:
54) And chamfer them:
55) Auto smooth this new polygons and it's done.
56) What we have till now:
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