Someone go and wake up Dave!
He is missing on uRuler purchases/donations.
When my 5 pcs of uRuler finally arrive, how can I proctect them from nasty fingers which etch away the gold and copper (through scratches) over time? Or should I wash my uRuler in IPA or acetone after each use? Use medical whipes? And put them in a silk pouch after each use?
I want the properties of uRuler to remain the same, not become stiff or anything, and still remain very straight on the edges.
Also like someone pointed out on youtube, is it safe to put precious uRulers loose in same envelope? What if they will be scratched? Has Dave done thorough testing on maybe five (5) uRulers in a same envelope and used steppermotors/servos to toss it around for 24h or something? Cheap Chinese pcb houses usually have some kind on shrinkwrap around pcbs, so they don't flop around and scratch each other in the package. Has Sagan thoroughly tested uRulers to be safe and suitable for long time use?