File Box No.1& 2 by Yavuz Demirhan (2018)

This is a very nice puzzle by Yavuz with a reasonably modest move count of 

20.14.2, but don’t let that fool you this is one tricky puzzle to disassemble!

The construction of the frame portion is particularly attractive with dowels adorning the pieces that interact with the two sliders.  

After quite a bit of time I was able to solve this one!  See bottom pic..

Yavuz also has a No. 2 version that bumps up the difficulty even more (45.6.2) with a third slider added to the mix.