It took me about 7 weeks inc the MEP as I did the lot on the twin. 2 weeks of that was keeping current while waiting for a good test day, which I had to bin after 40 mins due to a lowering cloud base. After planning the div back to Bournemouth in the lower ground, I asked the examiner if we could get the cts and single engine work done, just leaving the nav. Job done!
Keep 20% in your back pocket for unplanned extras.