Anycubic Photon Printable Resin Tray

Print this upside down. When you print the retainer, make sure the tapers on the holes are up. Use 100% infill for the retainer but the main part could be 20% or more.

BOM:

1 Frame - $2.71 with 30% infill and $20 per KG.

1 RetainerA - $0.60 of PLA at 100% infill.

1 RetainerB - $0.60 of PLA at 100% infill.

8 M3x16mm flat-head screws. 14 or 18mm will also work.

Philips (way cheaper):

https://www.amazon.com/gp/search/ref=as_li_qf_sp_sr_tl?ie=UTF8&tag=httpwww300blk-20&keywords=/B000NHVQXU&index=aps&camp=1789&creative=9325&linkCode=ur2&linkId=8e009ce2566c3bef5888cf201a6455f5

Socket:

McMaster 92125A134

https://www.mcmaster.com/catalog/125/3135

24 M3x10mm flat-head screws.

Amazon:

https://www.amazon.com/gp/search/ref=as_li_qf_sp_sr_tl?ie=UTF8&tag=httpwww300blk-20&keywords=/B000NHVQXU&index=aps&camp=1789&creative=9325&linkCode=ur2&linkId=8e009ce2566c3bef5888cf201a6455f5 https://www.amazon.com/gp/search/ref=as_li_qf_sp_sr_tl?ie=UTF8&tag=httpwww300blk-20&keywords=/B000NHVQXU&index=aps&camp=1789&creative=9325&linkCode=ur2&linkId=8e009ce2566c3bef5888cf201a6455f5

McMaster :

91294A130 or 92125A130

Also consider parts from www.boltdepot.com

Need 32 of M3 brass inserts that are 4.1mm OD and 3mm long.

https://www.amazon.com/gp/search/ref=as_li_qf_sp_sr_tl?ie=UTF8&tag=httpwww300blk-20&keywords=/B000NHVQXU&index=aps&camp=1789&creative=9325&linkCode=ur2&linkId=8e009ce2566c3bef5888cf201a6455f5

I am not sure how liquid-tight PLA is, but you could always apply a layer of resin to it, and then cure that into the PLA to form a seal. Or dip or spray with Polyurethane.

This will use $3.50 of filament if you pay $20 per KG.

I am using PLA because it is the stiffest and has the least warp. You can spray it with clear paint to seal it.