CSFB crossfinder has been my go to route for executing large blocks of shares via darkpools without affecting market prices. But with CSFB routes ending at the end of the month I need to find an alternative within IB. IB offers JeffAlgo and Foxriver algos but I don't have any experience with these routes. Can anyone speak of their experiences using dark only routes for these algos? Specifically JeffAlgo DS and Fox River Dark Attack.