Hi Jeff, I use this exact kit a few times a month and I do mine the same as black and white and get perfect results.
Every 1 minute I do 3 inversions for about 10-15 seconds in total.
I would advise against using the twiddle stick apart from the very first agitation after pouring in chemicals.. I had developing problems at the sprocket holes when I only used the twiddle stick instead of inversions.
Best of luck!