Oh man. Don't take this personal, but I hate stone for landscape beds...but that's only because I've been the one (i.e. the victim) of shovelling them out so many times I can't remember for landscape installs/updates. That's probably the worst landscaping job there is. I've filled thousands of wheelbarrows and 100+ dump trucks digging them out. <Cringe>
Nice work! and i love the wheelbarrow with dual wheels! That must be so much easier to use. I didnt know such a thing existed. I tip mine all the time. luckily the wood frame is about to snap any day now (after 20 years of use). This 2 wheeled job is going to be its replacement!
Wrenched my back really bad a few years ago with a single wheeler and once I could move again I got the 2 wheeler and have never regretted it!