I had my first cutaway yesterday at jump 353,almost the same problem as you upon opening my left brake line released and ended getting stuck in the slider about 5 feet above my reach.The canopy was flying with a slow left turn and the only way to flare or turn was with the rear risers so i cut away and had a great reserve ride and a good off dz landing.
If i had to do it over again i would do the same thing. Better to buy beer and a reserve repack than get injured or killed by landing a less than perfect canopyQuote