So my scape is pretty minimalistic and tame, no insane overhangs. The only rocks that I would be looking to attach together would be the 4-5 in the pile on the left. I see a lot of people recommend Marco-400 for a good mortar. Since I don't have a whole ton of crazy things to put together, I don't want to get the entire bucket off of BRS and have most of it go to waste. Are there smaller portions of the Marco? Are there other products that would work just as well that don't come in a huge quantity?