Enclosure 3D Printer for ABS Anet A8

I was trying to print ABS with my Anet A8 but i had some problems like layer separation and splitting, later i saw on internet that need have an enclosure for keep the temperature hot, i was looking in thingiverse and i found some but requires a lot of filament need or more things, so i designed and made my own enclosure

Material:
MDF 3mm with the next cuts:
3x- 50x60cm
2x- 50x50cm
40 Bolts M5x16mm with nuts