This shadowbox is very easy to print, but requires a dual extruder for the best performance. You can scale the STL's down if you can't print at full size(302mm x 250mm) --just make sure you adjust the screws and bolts to fit. Here's the part list you'll need to complete:
1 x USB - Powered LED Light Kit
2 x M3 Knurled Hand Screw
2 x M3 Nuts
8 x M4 x 4mm Female Thread Threaded Insert Embedment Nuts
4 x M4x10mm Flat Knurled Thumb Screws
4 x M4x10mm Button Head Bolts
3 x White Nylon Cable Zip Ties 2.5mm x 4"
The STL's are designed to be merged in your slicer. There is a "Front" and "Back" file for each color "Silver" and "Clear". 4 total files for 2 total prints. Put them together with the M4 nuts and bolts. The only place that uses the M3 nuts and bolts are for the adjustable foot. The LED strip in the link above is sized perfectly for this case and fits into the guides without using the sticky backing. You might need to snip the backing in some parts if it doesn't want to stretch straight in some sections (it comes curled up in the package) Use the zip ties to secure the control along the back of the unit for hidden, but easy access. Plug it in and you're done!
Please share your makes and let me know if you have any questions in the comments.