The current Multimeas Rest setting that applies to all staves in the stack is inadequate for multi-percussion parts. There needs to be a way to allow the number to sit differently depending on the number of staff lines. It might something as simple as an option to offset the number from the top staff line rather than the reference line. But whatever the solution is needs to take into account that a 1-line staff requires slightly different spacing than a multi-line staff. (Due to presence of the multimeasure rest shape sitting on it.)