Very nice. Congrats on the acaule. Remember to mulch it with A LOT of pine needles. Don't just assume that the garden mulch you have around it is just as good. It's not likely anywhere near what is required.....In fact, because it is meant for most mixed planted gardens, that mulch is likely a lot closer to neutral than is required by the acaule. They need acid! They need a very thick layer (2 or 3 inches deep), of decomposing Pine needles to acidify the soil and keep the plant happy. You need to top up the needle bed each year with fresh Pine needles. Since acaule roots grow wide and shallow, make the patch of Pine needles about 3 or 4 feet wide, with the plant in the middle.
Good luck.