Strategy for 38 to 45 Quant -- Need Feedback

I wanted to get some feedback from you all out there regarding my study plan to move from a 38 quant score to a 45 quant score. Thus far i've taken 3 Manhattan GMAT CAT tests and scored 630, 620 and 640. My verbal score in all three tests has hovered in the 38-41 range. I'm not worried whatsoever with regards to my verbal. I'm doing a mix of about 20 verbal questions per day in order to stay fresh and maintain my skills.

Obviously, much of the improvement I need to focus on is in the quant section. I'm wrapping up the final MGMAT quant book and although I've learned a lot, I still feel that I have to go back and cement some of the concepts in my head. I feel very good about FDP's, and Geometry. I think most of my problems in the quant section arise from a lack of skill in properly breaking down word problems/rate problems into algebraic equations, and from an inability to create a system of equations in order to solve the standard quant questions. In addition to the aforementioned, I'm also missing between 7-10 questions on each quant section as a result of stupid errors.

I originally scheduled my test for October 19th but given my work schedule, was forced to reschedule to November 23. This gives me a good amount of time (I hope) to address my weaknesses and get the score I'm after. Regarding my score, I'm not after an astronomical score by any means. I'm shooting for a GMAT of around 680. If I can get that, I feel that the rest of my profile and application will pull me through just fine.

I spent some time this evening reading articles and preparing a plan for the next 6 weeks of study. Would you all be so kind as to comment on my plan as well as suggest additional material/methods that may help me improve?

Below is my rough plan.

After I finish the last GMAT Quant Guide, I'm going to start again from the top and work my way through the books. I purchased the GMAT Quant review book so I will be answering questions from there in addition to re-answering questions from the OG. In addition to re-reading the materials and my notes, I will also be watching the corresponding "Thursdays with Ron" video on the MGMAT website. I just watched my first one today regarding combinations and I think that it was very helpful. My goal this time around is to gain a deeper understanding of the concepts and how they are incorporated into the GMAT. I will be supplementing the MGAMT materials with the Kaplan math book. I plan to spend about 1 week per book reviewing the materials and watching the videos.

I signed up for BTG's daily quant question and will be solving those in addition to the questions from GMAT Club.

I now have data from three MGMAT CAT tests and will be going through it in order to figure out where my weaknesses lie. The only problem is that I took two of the tests prior to completing the MGAMT Quant Guides. I think that my errors may be skewed towards areas I have improved upon. What is the best way by reviewing the tests reports to evaluate my weak areas?

Starting the 26th, I will be taking the last three MGMAT CAT's as well as the 2 Prep Tests in order to continue to get myself in the GMAT groove.

Do you all think this is enough to get over the hump or are there other things I can be doing? Please give me any advice you may have - I'm all ears.

Thanks for the help.