BLOCK BURR PUZZLE

Thanks for (model from) Frank Worrell (2010).

Pieces 6
No rotation
Goal 6×5×5
Holes 15
ONLY 1 Solution
35 moves

After assembly it seem simple shape, symetric.
A challenge to solve and for many people, a challeng too only for remember how to assembly ...

Got a lot of satisfaction when done and hold it in your hand !
size model 6cm long 0,1 mm offset for the big one
0,2 for the small

See the zip file for tips and solution,
otherwise you'll become crazy with it .
Tell me if you solved it by youselve !