I created replacement biscuits for Dwarven Forge Lowtown/Starforged kickstarters. I started with the thin one specifically for the straight roof biscuit slot that is too thin for the normal biscuits to fit. Then I created a full thickness version because the Dwarven Forge biscuits are quite sharp and seem to tear up the biscuit slots with repeated use. 

I printed in PETG with a 0.4 nozzle. You get a natural smoothed out bump just because the nozzle can't print a harsh corner and they work very will without tearing up the slots in the Dwarven Forge pieces. 

I included scad files if you want to make any tweaks.