I've been wanting to do this to my 4343's for a long time now and wondered why no one has offered something like these boards that just showed up in my ebay feed. Does anyone here have experience with these specific boards/networks, or with Echo Mountain Audio? Ebay listing:https://www.ebay.com/itm/325442735517Slightly Website:https://echomountainaudio.com/collec...bl-4300-series