diff --git a/M4MStuff/gens.ps1 b/M4MStuff/gens.ps1
index b35b4e856ca7fb5133868ece8d53d200d780a4fc..d8b14ecd885d7b5fd3109ded7230d53800003ed9 100644
--- a/M4MStuff/gens.ps1
+++ b/M4MStuff/gens.ps1
@@ -1,14 +1,18 @@
-param($noGen = $false, $commonParamFile = "commonparams.txt")
+param($noGen = $false, $commonParamFile = "commonparams.txt", $repeatCount = 40)
 
 <# Usage notes
 
 To run this, you need m4m on your path (See the M4M readme for help with that)
 It will produce some directories, each containing a spread of experiments and files to run and 'post' them.
 
-#>
+$noGen can be set to true so that the run/post files are created, but not the experiment files
+$commonParamFile sets the common parameter file
+$repeatCount is the number of repeats; 40 is traditional for final runs
 
+#>
 
 # ranges
+# NOTE NOTE: seed/r coresponance is good here; not on IRIDIS runs (must consult logs as necessary)
 function repeats($n) { 0..($n-1) | ForEach-Object { ,@($_.ToString("00"), $_.ToString("00"))} }
 # funky ordering is to match the funky ordering of the runs that are used in the paper (for seed generation) (sorry)
 $twentyHalf = (("0.00", "000"), ("0.10", "010"), ("0.20", "020"), ("0.30", "030"), ("0.40", "040"), ("0.50", "050"), ("0.60", "060"), ("0.70", "070"), ("0.80", "080"), ("0.90", "090"), ("1.00", "100"), ("0.05", "005"), ("0.15", "015"), ("0.25", "025"), ("0.35", "035"), ("0.45", "045"), ("0.55", "055"), ("0.65", "065"), ("0.75", "075"), ("0.85", "085"), ("0.95", "095"))
@@ -17,7 +21,7 @@ $one = (,("0", "0"))
 $lambdas = (("0.00", "000"), ("0.02", "002"), ("0.04", "004"), ("0.06", "006"), ("0.08", "008"), ("0.10", "010"), ("0.12", "012"), ("0.14", "014"), ("0.16", "016"), ("0.18", "018"), ("0.20", "020"))
 
 $runName = "One"
-$repeats = repeats(4) # full batches were all 40 (CPUs per node on IRIDIS)
+$repeats = repeats($repeatCount) # full batches were all 40 (CPUs per node on IRIDIS)
 
 # standard Z
 . .\genSpread.ps1 "Standard" "Standard" 400000 Z r Z r $twentyHalf $repeats {param($x, $y) "Z=$x"} $runName 100 $commonParamFile $noGen