The 35-year old joined on trial in July, but is yet to sign a permanent deal.
Eustace arrived on trial in July with a view to signing on a permanent basis, but no deal has been agreed as yet.
Hardie was asked about Eustace’s involvement by a fan, to which he replied:
He is working on his fitness but he helps us in the dressing room, in training and before games https://t.co/hCq7zHyBC8— Rangers Youth DC (@rfc_rydc) September 24, 2015
The knowledge the 35-year old imparts on the squad has been recognised by both Mark Warburton and Andy Halliday, with the latter expressing his desire to see Eustace join on a permanent deal, in an interview with the Express.
Experience is the major component lacking in this new-look Rangers side and Eustace’s involvement, in some capacity, would be beneficial.
The hold up in securing his signature suggests he is struggling to prove his fitness, after suffering a knee injury in January which curtailed his season and led to the Rams releasing him, and doesn't bode well for his playing prospects.