YCCC is planning another production run of this excellent two- to four-radio switching box and keyer. Even if you don't operate SO2R, it's a great way to share mic, paddle, phones, and PTT among multiple rigs in the shack. See http://www.k1xm.org/SO2R/index.html for detailed info or https://sites.google.com/site/rtavan/yccc-so2r-box-product-review for my review of the box. Contact Dennis, W1UE, at so2rbox@verizon.net to order.  They don't do production runs very often and ordering for this run ends in June.