This is a cool project. In reveersal processes the first develope is key as it really determines what the second developer will have to work with after teh reversal step. To trouble shoot I would recommend running you D11 on a roll as a negative process (Dev, Stop, Fix etc....). Keeping your times as you would for the resersal process then evaluate the results. If all looks good then yoou can assume that the D11 is good.