@Anonymous
For the base plate the oversized holes (Please note i am working on the UK install so working in MM not Inches)
On the Anchors and Holes tab, set the hole tolerance to Variable, in the example below i have 20mm anchors and want 30mm holes in the base plate so the Tolerance Value is set to 10mm

For the washer plate holes i want these to be 22mm holes so i set the Hole Tolerance Definition to Variable and set the Tolerance Value to 2mm

For new Anchors as @ToanDN and @múinteoir have said they are based on the anchors from Advance Steel, to add new anchors or sizes to the Advance Steel databases please see the Autodesk Video below
https://www.youtube.com/watch?v=gGCvrv2vIVM
Once you have your new anchors you need to get them into Revit, all the Revit bolts and Anchors are taken from the Advance Steel databases which have been copied into the Revit folder Structure, so you need to copy the Advance Steel Database with the new anchors and paste it into the Revit folder structure. Please follow the steps below (Again please note i am working on UK builds so the fodler paths will be different)
1. Shut down Revit and Advance Steel
2. Go to the following folder - C:\ProgramData\Autodesk\Revit Steel Connections 2019\en-UK
3. Rename the AstorBase.mdf to AstorBaseOriginal.mdf (Always best to have a backup)
4. Delete the file AstorBase_Log.ldf
5. Go to the following folder C:\ProgramData\Autodesk\Advance Steel 2019\GBR\Steel\Data
6. Copy the file AstorBase.mdf and paste it into C:\ProgramData\Autodesk\Revit Steel Connections 2019\en-UK
7. When you reboot your Revit you will now have the Anchor that you created in Advance Steel available inside your Revit Base Plate connection
Rob Merriman, AEC Technical Lead, Graitec
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