DIY: finally, 3-ply+hotspotless+positional sensing

[nemo]

Eventually I managed to create a monster, where almost everything can be tuned:
-height of cones
-balance between center and outer zone (pot)
-strength of rim signal (pot)
... actually it wasn't me only, the (patient) owner of trigmann.de created many hardware versions.
Tested for 10 days, so I can say it's reliable (although still a bit messy).
And this is the result.

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[nemo]

And some more, of anybody is interested to follow:

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[nemo]

Just noticed, I created the topic in the wrong place
Rob, could you help and move to DIYers?
Thanks in advance and sorry

[AKA Wayne]

Whoa that is a monster. So you don't reverse polarity the center piezos? Also what setting do you use?

[nemo]

Nope, I do not reverse polarity. But if needed, it's easily doable from the bottom side
I use settings for center piezo for now. But again, in case I need to get rid of the center part and use 3-piezo-settings, I can easily lower (and/or disconnect) the center cones.
For now even Rob admits the ps works a bit better with the center trigger.