Grin is c29z + c32 (and 80% c32 --> 100% c32 by Jan 2021)

[johndavies24]

Currently, you are only pulling c29z for grin algo. It is currently 80% c32 though, so the cost to attack is misleading. Grin also uses a dynamic weighting algo that ensures 20% of the blocks are c29z and 80% are c32, so attacking is slightly more complicated than picking one algo. By ~15 January 2021, about 4 months away, the PoW will be 100% c32, so if you just switched to the c32 data you would be sufficiently accurate and soon to be completely accurate.