Bminer, one of the most popular Nvidia miners for the cryptocurrency Grin and Aeternity, in its regular version 15.4 added a bit more hash rate on the algorithms Cuckaroo29 and Cuckoo Circle. Also in this version an experimental "--fast" flag is added, giving even more performance, but with less stability. Our test of operation in the Fast mode did not reveal any problems, but the mining speed changed only slightly within the margin of error. Bminer is distributed on the Bminer.me website as closed software with a commission of 1%.