Thanks for reaching out. If you have been that close with 4:12, I´m sure we can break your 4 hour limit.
Any Boost plan is completely personal and optimized based on more than 50 questions about you. This ensures you the best training possible. And the time frame from now until Paris sounds fine.
You can read about our plans here: http://offer.boostmarathon.com/training-programs/
I look forward to see you join us..
Your Boost Support