With Mike's CS approach the only thing that changes is that abeam the threshold on the downwind leg and onwards for the rest of the flight you start setting your power using RPM instead of MP. Abearm this should be set to 1800-2000RPM, on base 1800RPM and final 1800RPM. The speeds stay the same (i.e. from abeam onwards maintain 85MPH). I must point out that these are Mike's numbers and that other pilots on this forum often choose to maintain slightly higher speeds on downwind and base, and many fly a curved base leg to avoid the 90 degrees base and final turns. Others choose to fly on AoA instead of speeds. Heaps of reading available on the forum regarding these topics. Most important thing is be safe, and if in doubt, get yourself some transition training. It's amazingly inexpensive (compared to the other costs with your build) and you will learn a bunch.