Just a heads up the Grabo is relatively new, well in Openreach anyway and not all Engineers have one.
Also as the majority of Installs are now done by Contractors, who certainly won’t have one so it might be a case of;
If you get an Openreach Engineer, who is not trained/has one gets an Assist from someone who has.
If you get a Contractor they Further the Job back for an Openreach Engineer.