anchor.diff:                     MBucket::pos_integer(), P1E::p1e(), AlignToBytes::boolean())
           -> ok.
   merkle_scale(Dir, FileName, N, EvalRepeats, MBranch, MBucket, P1E, AlignToBytes) ->
  +    merkle_custom(Dir, FileName, N, EvalRepeats, MBranch, MBucket, P1E,
  +                   AlignToBytes, power, 5, ?EVAL_FTYPES).
  +
  +-spec merkle_custom(DestDir::string(), FileName::string(), N::pos_integer(),
  +                    EvalRepeats::pos_integer(), MBranch::pos_integer(),
  +                    MBucket::pos_integer(), P1E::p1e(), AlignToBytes::boolean(),
  +                    StepSize::step_size() | power, Steps::pos_integer(),
  +                    FTypes::[update | regen]) -> ok.
  +merkle_custom(Dir, FileName, N, EvalRepeats, MBranch, MBucket, P1E, AlignToBytes, StepSize, Steps, FTypes) ->
       Scenario = #scenario{ ring_type = uniform,
                             data_type = random },
       PairRing = #ring_config{ data_count = N,
  
positive.code:                          align_to_bytes = AlignToBytes },
  
      eval(pair,
           gen_setup([random], ?EVAL_FTYPES, [random],
                     Scenario, PairRing, [Merkle]),
           data_count, 5, power, N, Options),
      ok.
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
negative.code:          merkle/5, merkle/9,
           merkle_ddists_fdists/5, merkle_ddists_fdists/9,
           merkle_scale/5, merkle_scale/8,
           merkle_custom/11,
           % art
           art/5, art/7, 
           art_scale/5, art_scale/7,
  