I found the stock piezo on the Portamento to be pretty good - quite well balanced and responsive. And more importantly it seemed tonally 'compatible' with the mags. The Portamento very much hangs together as a well integrated system, IMO, compared to some which are more like collections of parts.
Certainly superior to the Spectorcore. I found the piezo to be very clackity-clack, harsh, brittle and poorly isolated from unwanted noise and difficult to blend with the mag pickup.
Back in the day I fitted a Shadow MaxiBass aftermarket system. That was very natural and mellow sounding, maybe due to the plastic saddle inserts. That also seemed to play nicely with the mag pickups.
As for the Chromes, I would give them more than a few weeks to settle before binning them off for pressures. YMMV.
Certainly superior to the Spectorcore. I found the piezo to be very clackity-clack, harsh, brittle and poorly isolated from unwanted noise and difficult to blend with the mag pickup.
Back in the day I fitted a Shadow MaxiBass aftermarket system. That was very natural and mellow sounding, maybe due to the plastic saddle inserts. That also seemed to play nicely with the mag pickups.
As for the Chromes, I would give them more than a few weeks to settle before binning them off for pressures. YMMV.