I typically prefer lye.
I used a vinegar/water mix, and not very much of it.
see first post, added list for Stax SR-407 w/ SRM-252S amp and HeadAmp Pico USB DAC demo
HeadAmp Audio Electronics - home of the Pico and Gilmore amps. Now offering Audeze, HiFiMAN, and STAX headphones.
Find us at www.HeadAmp.com
Alright so everyone, UPS with TRACKING and idk like $1000 worth of INSURANCE?
Thanks again Justin
Wow, that's really generous of you to include 16 people instead of the 10 originally planned. I can't tell you how excited I am. Thanks again for the opportunity. Like many others I would have no other way to demo a Stax setup. This changes everything! I'm so excited. :D

the stax headphones are very reliable, i think they can tolerate 16 people. will see how things go.
HeadAmp Audio Electronics - home of the Pico and Gilmore amps. Now offering Audeze, HiFiMAN, and STAX headphones.
Find us at www.HeadAmp.com
The cost of the SR-407 + SRM-252S + pico USB DAC is $1369 so I'd imagine you should insure it for at least that much. But I'm sure Justin will communicate all the details over email.
Ugh... I miss them already... I just wish I had a more powerful set to use them with. I love my Fiio stack but something a little stronger would have been nice. Its all good though, because of that demo it opened my eyes and now its time to start over and upgrade my setup. Those of you that got the LCD's what type of amps were you using??
Thanks,
Justin how do you want us to handle the shipping. Do you have a preference of what we use and how much insurance should be on the package? Keep it how it was under the original agreement or change it up and go with your provider or what ever company makes you the most comfortable. I don't think anyone will have any issues with whoever you want us to use or however much insurance you want us to buy.
Thanks again for giving us this great opportunity.
Thanks,

Here's some Stax pictures. Sorry for the low quality, all I have to work with right now. I've got the amp as a base for the very tiny Modi and Magni :]
Didnt make it on the list :( Please let me know if a second opportunity opens up...My next purchase will be a stax rig, just a matter of which ones.