I'm at the same point you are. Last time out in the course, I got my typical 3 at -35 then decided to slow the boat down to 32mph and fairly easily made a few passes at -35....but it taught me that I need to get WIDE enough to make a -35 pass no matter the speed. The first pass at 32 mph I caught myself at 1 and 2 ball not carrying the handle out far enough and also not fully extending the reach. These were things I knew I needed to do, but to be able to feel it at 32 mph where I seemingly had some time to think really helped out.
Though tired, I sped back up to 34mph and made 4 and just kissed the inside of 5(celebrating thinking I was going to run it) as I flattened out for a moment coming out of the turn at 4 ball.