Brass and Copper are diamagnetic. Aluminum is paramagnetic. They operate differently on the coil signal. I think a Steel plate may actually be better than either in this case. It shouldn't raise the inductance enough to significantly affect the highs, even with an average ~350pF guitar cable -- probably still being below 2H, since it's not in the coil core. However, the slight combined bass and magnetic increase should give more punch, while offering more height adjustment leeway to balance the output than a Brass or Aluminum plate would. The bass response below ~400Hz is much less at the bridge than at the middle and neck. It should actually help equalize the sound better than Brass or Aluminum. Although, nobody has tried it yet, so we'll just have to see.

Add: I forgot to discuss how to best mount the plate. I don't trust the wax melt method. I'd remove any wax and use silicon glue, or duct tape on the bottom stuck up to the sides of the pickup, which should first be cleaned and wiped with alcohol.

BL Equipped Guitars:
-Parker NiteFly V1 Strat type: Wilde L280SN/L200SM/L200SL/L280SL w/L-filter & MT.
-Agile ST-625EB: Wilde Microcoil S set.
gckellochguitartech
Edited 3 times by gckelloch Dec 17 15 8:14 AM.