Yeah, kind of…
Assembly, Lid, Gas Struts for hold and slow close
Parts
- 2x 30N (7lb) Gas Struts. Remove spring metal clips and drill ~3.4mm holes, ping me if you’re at this point and need details.
- 4x M3x16mm button head bolts, ideally flanged.
- 4x M3 Slide-in nuts ideally. Maybe roll-in, but not T-Nuts.
- 4x M3 Nuts to secure M3 Bolts to Gas Strut end.
Edit 1: Tried 40N (10lb) on just one side (20N on the other), this results in Lid holding position at any angle. Definitely an improvement over 2x 20N Struts which drop too fast when Lid is < 45 degs from horizontal. However…
Look at Orange circle in the pic, unfortunately the printed hinge isn’t strong enough to resist entire Lid being lifted up ~3mm 
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So, am reverting back to 20N Struts on both sides until if/when more rigid hinges are being used. Maybe regular metal 2020 to 2020 hinges with small plates that will clear the panels, or, mount regular metal 2020 hinge on 4mm thick printed packer/spacer for panel to slip under. Using separate printed regular corner panel clips.
Edit 2: Ideally Struts would be inside the lid, making for a cleaner exterior. Am having to work on some other stuff for a while. So…
A Beer/Coffee bounty, and bragging rights awaits anyone who comes up with model(s) I can print that will enable Gas Strut to be mounted internally (and not tear Lid apart). Welcome to mod the parts am using currently if that helps. Something that mounts the Strut here maybe…
Edit 3: Settled on 30N. They’re strong enough to hold Lid open > 30 deg. Lid closes at exactly the right speed I wanted, silky smooth descent. Strut strength was trial and error matched to the weight of my Lid consisting of 1/8" Panels. Also tried 20N and 40N, but 30N was right for my build.
Beer/Coffee/bragging-rights bounty still available for nice internal Strut design…