Deep waters beckon you, my friend. That did the trick, thank you.
edit: I left you 3 PMs TM, during the night while working on something with this script re:rare fish... sorry for the spam

Where I'm at now, in case anyone else wants to keep rare fish, is to simply only cut stacked fish via findStack. Trying to include or exclude a long list of fish is more high maintenance than it needs to be given that common fish stack and rare fish don't. The downside is that whenever the cutfish sub runs a few stragglers are left in your pack, 5-6 on average, but the upside of that is that your lure is back in the water that much more quickly.
P.S. - findcol was not working for me, my 20+ stone barracuda were still being cut with the weight set at 11 stones. The above is working though...