When I drove up the road from the MM's I came to a lay-bye where I peered out over the hedge and saw the Pipers. Next to the lay-bye was a typical Cornish fieldgate...strung together with more baler twine than wood...so just walked across the rough grassed field to them.
Yes that's the decorated stone (replica) but there is also a huge cupmark on the capstone.
I found it quite sad to see the "decorated" stone in truro museum, it's a great stone and the replica doesn't come close, it's the same with the replica stone at bryn celli Ddu as well.