Here is my version of a closed chamber for the UM2 required to print large ABS parts without (or at least with reduced) warping.
The 4mm acrylic plat...es I used are standard sized and glued, hence no cutting required. Source: http://www.plattenzuschnitt24.de. I spent roughly 35€ on all parts. The rear of the top lid will be covered with cloth.
Door_print_assembly_AllCATPart_v2_no_gap has no gap in-case you do not want to use a seal of any kind (also worked fine for me).
The door handle, hinges and corner pieces are printed.
For the holes I added a PDF template size A3.
Handle_v2_AllCATPart: I also added a second handle which closes with a filament (see picture above 'Handle V2') if you do not want to use a magnet to keep the door locked.
UPDATE: Just added to RAR archives containing individual parts for each version (request).
What you need
Acrylic sheets:
2 pieces: 0.3x0.3m (door plus to cover)
3 pieces: 0.3x0.2m (side pieces of top cover, rear is covered by a cloth)
Printed parts:
2x lower hinge (printed)
1x upper hinge (printed)
3x hinge shaft (3mm filament)
1x door handle (printed)
2x corner front piece for lid (printed)
1x corner rear piece for lid (printed)
1x corner rear piece for lid with screw holes (printed)
Rest:
2x magnets for door
4x 0.3m door seal
5x M3x8 countersunk screws
3x M3 nuts
Printed parts:
2x lower hinge (printed)
1x upper hinge (printed)
3x hinge shaft (3mm fil...ament)
1x door handle (printed)
2x corner front piece for lid (printed)
1x corner rear piece for lid (printed)
1x corner rear piece for lid with screw holes (printed)
Rest:
2x magnets for door
4x 0.3m door seal
5x M3 countersunk screws
3x M3 nuts