Just to play devil's advocate ... What about all the "data" here, that says in-house separation rarely leads to reconciliation? Maybe you (we) have to destroy the marriage in order to save it. Maybe a 1-2 year in-house S is pointless?
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final