Be aware that the MP (and M4P/M6/M7) framelines are sized for accurate (?) framing at minimum focus. At greater distances there will be more on the negative than you saw inside the framelines. This is especially true of the 50m frame, so if you bring the 50 (and I think you should) you need to be aware of this. The 50mm frame, at around 15 feet, covers only the same area as my 60mm Elmarit on the R6. So it's 20% undersized at that distance. Therefore, "shoot loose" especially with the 50! Otherwise your negatives will have "No Parking" signs at the edges, and you won't know how that happened.
Other than that, I think it's all been covered. Enjoy, it's a great camera, despite this one flaw. I've got two of them!