You should’ve followed my plan on Happy. Just kidding. I’ll be following this thread. I’m a bit behind you even though I’m also planning on completing the XCO Speciality-plan for 28:th of July.
It sounds like in your case that back-to-back Build Phases would be the most appropriate approach for your time constraints. This is a recommended approach, however, it is important to carefully consider how you are feeling and closely monitor your levels of fatigue/recovery.
If you were able to complete all of your Build workouts the first time through, and are feeling pretty fresh, you can choose to simply repeat the Build Phase with the typical 8 week format.
If you are feeling a bit fatigued, then making the adjustment to a 2:1 work/recovery ratio could be a good way to continue with the Build Plan, but also give your self sufficient time to recover. The typical training plans have you working for 3 weeks before you get a recovery week. For this adjustment, you will do two weeks per recovery week. Overall, your progression will look like this