I see, so he shouldn't even know his 1RM, while working, outside of doing it purely for testing/reference purposes.
This raises the question, with regards to program adherence, to the OP again how many times a month, and/or, are you working/testing in the 90-100% 1RM range? You had said your pull has been stalled at X amount of weight for one and a half to two months. Essentially, how many times, in that given time period, have you worked at, or tested your pull at X weight? If the frequency is higher then your threshold for systemic recovery then your stall will eventually lead to regression had you continued to work with frequency at such a high percentage of your 1RM. Also your diet plays huge into the equation as stated in my previous post if your not meeting caloric requirements your working backwards as well as dealing a huge hit to your recovery time and efficiency.
Edit: Grammer