I've used my sea anchor frequently and have never had any problems with it fouling the rudder. On my new kayak I mounted U-bolts on each side behind my seat. The main line for the sea anchor is attached to a U-bolt with a stainless steel snap hook. I can attach the main line to either U-bolt to adjust my drift attitude. I have a smaller line attached to the small end of the sea anchor. This line has a snap hook that clips to an eyelet that is just forward of my seat. If I need to rapidly retrieve the sea anchor I just pull in on the small line to collapse the cone and pull it into the yak. Much easier than trying to drag it in with the main line.