diff --git a/playbook/shopfloor-setup/gea-shopfloor-cmm/scripts/Backup-CMM.ps1 b/playbook/shopfloor-setup/gea-shopfloor-cmm/scripts/Backup-CMM.ps1
index 8e14826..adde916 100644
--- a/playbook/shopfloor-setup/gea-shopfloor-cmm/scripts/Backup-CMM.ps1
+++ b/playbook/shopfloor-setup/gea-shopfloor-cmm/scripts/Backup-CMM.ps1
@@ -63,6 +63,30 @@ foreach ($s in 'Backup-goCMMSettings.ps1','Backup-PCDMISSettings.ps1') {
     catch { Log "  ERROR in $s : $($_.Exception.Message)" }
 }
 
+# --- C:\Program Files\WAI (+ x86): whole vendor tree, captured complete.
+#     Holds machine/controller content beyond what the per-version PC-DMIS backup
+#     grabs. NOTE: can be multi-GB if WAI contains the full PC-DMIS 2016 install. ---
+$waiRoots = @("$env:ProgramFiles\WAI", "${env:ProgramFiles(x86)}\WAI")
+$waiPresent = @($waiRoots | Where-Object { Test-Path $_ })
+if ($waiPresent.Count -gt 0) {
+    Log "---- capturing WAI tree (whole) ----"
+    $waiStage = Join-Path $env:TEMP "wai-bk-$ts"
+    New-Item -ItemType Directory -Path $waiStage -Force | Out-Null
+    foreach ($wr in $waiPresent) {
+        $label = if ($wr -like '*(x86)*') { 'WAI-x86' } else { 'WAI' }
+        robocopy $wr (Join-Path $waiStage $label) /E /R:1 /W:1 /NFL /NDL /NJH /NJS | Out-Null
+        Log "  copied $wr -> $label"
+    }
+    $waiZip = Join-Path $dest "wai_backup_${env:COMPUTERNAME}_$ts.zip"
+    if (Test-Path $waiZip) { Remove-Item $waiZip -Force }
+    Add-Type -AssemblyName System.IO.Compression.FileSystem
+    [System.IO.Compression.ZipFile]::CreateFromDirectory($waiStage, $waiZip)
+    Remove-Item $waiStage -Recurse -Force -EA SilentlyContinue
+    Log "  WAI backup: $waiZip ($([math]::Round((Get-Item $waiZip).Length/1MB)) MB)"
+} else {
+    Log "No C:\Program Files\WAI (or x86) - skipping WAI backup"
+}
+
 # index of what we captured
 $zips = Get-ChildItem $dest -Filter '*.zip' -File -ErrorAction SilentlyContinue
 [pscustomobject]@{
@@ -71,6 +95,7 @@ $zips = Get-ChildItem $dest -Filter '*.zip' -File -ErrorAction SilentlyContinue
     Timestamp = (Get-Date -Format o)
     goCMM     = @($zips | Where-Object { $_.Name -like 'gocmm_backup_*' } | Select-Object -Expand Name)
     PCDMIS    = @($zips | Where-Object { $_.Name -like 'pcdmis_backup_*' } | Select-Object -Expand Name)
+    WAI       = @($zips | Where-Object { $_.Name -like 'wai_backup_*' } | Select-Object -Expand Name)
 } | ConvertTo-Json | Out-File (Join-Path $dest 'cmm-backup-index.json') -Encoding ascii
 
 Log "================ DONE ================"