Manual Mount Axis Stiffness...

[Stargazer McCabe]

I have recently purchased a new Berlebach Castor Mount that I'm enquiring about.

I already own a Ercole Mini which works flawlessly and which I am drawing the comparison with. 

I've noticed that both the Castor's axes are noticeably stiffer than the Mini. Even with both tension bolts backed off on the Castor it takes a bit more "effort" to track. The Mount is correctly balanced in both axes I believe as this is a tad tricky to determine given the apparent inertia. 

I have dropped Berlebach a note but in the interim I wondered whether those with experience would suggest that with use the axes will free up, whether any form of lubrication is advised or whether the Castor is a Mount with inherently more resistance than I'm used to. 

Thanks in advance...