The @Bulk Reef Supply video that I watched they used thicker super glue and the Marco mortar. For building the rocks, I did not like the mortar as it was much darker in color then the actual rock. I had watched another video online (can't recall who it was, but it was an Australian reefer) that used the super thin superglue method with the crushed rock to better color match the rock. If you sprinkle the rock dust on the glue just before it is totally dry, the dust sticks to it but does not get darker. I did not do this to all of my joints, but now that I'm done I'll probably go back and dust the ones I did not do.Nice update. Did you see that BRS video (I think it was), where they basically ‘squirt’ a certain type of glue into the cracks and it hardened fast?