Master Tutt’s Icosaminx modified from megaminx

Master Tutt’s Icosaminx is a corner turning icosahedron consisting of four-layers of regular triangles of identical size. As shown in YouTube video below, this set consists of totally 147 pieces (1 core piece, 3 sets of 12 corner pieces, 30 edge pieces, 60 internal pieces, and 20 center pieces). In addition, two sets of 12 screws (length 12 to 18 mm, thick one; length 25 to 30 mm, M3) are needed. Stickers can be modified from those for 4x4x4 cube (each width 13.5mm).
Unlike my other puzzles, th