However gear grinding has a lot more to do with your z-axis calibration than the spool holder. I have about 400 prints on my Press so far since I got it.

less than 20 of my total prints were before having to do full calibration in which I experienced a bunch of issues including stuck filament..etc

The rest have been post fan reversal and correct and very accurate z-axis calibration, as well as not printing on glass.
I haven't had a single problem with grinding since.

A good gauge of poor calibration values is switching between 0.3 layer height and 0.1 layer height. I found that if your z-axis calibration is about right, you can get away with printing 0.3mm, however when lowering to higher quality 0.1, you tend to get gear grinding - which is a good indicator that you should further tune your z-axis calib values

The Press lid cause pressure on the filament and the gear start to making noise and grind the filament.

One solution that work perfect for me.

http://www.thingiverse.com/thing:754193

Now you got no more pressure on the extruder, gear stop grinding the filament and vent is much better.

Also you could use whatever spool you want.