want a function that takes `q_o` and `q_o \ q_!` and returns masked `q` for simple replacements, easy for more complex ones, e.g. disorder correction, would need to re-use the OP alignment testing code
want a function that takes
q_oandq_o \ q_!and returns maskedqfor simple replacements, easy
for more complex ones, e.g. disorder correction, would need to re-use the OP alignment testing code