via this auction
"Everything was meticulously cleaned by hand during the restoration. Sliders were dismantled, cleaned, polished, lubed, tested and only the best internals were used resulting in an accurate and perfectly smooth operation. All original Arp slider caps are included! Each switch was cleaned and slightly lubed. Old capacitors and some other old components were replaced then the synth was calibrated giving you a reliable Arp that sounds crisp, clear and full of tone. The keybed was also restored, keys cleaned, buss bars and spring contacts polished, key heights leveled, and new key bushings installed so the action is like new and all keys trigger perfectly..."
