Rob is correct circles, I see you have done that. Honestly I never count because the numbers are just a starting point. Gives a base so you aren't doing 5 circles and checking then 5 and checking and so on. I guess I'd say there is no need for anything in between. Only reason I went 1k,2k then5k was because I felt 1k to 5k was a little bit of a jump. I didn't have the 2k at first and it took alot of work getting my 1k scratches out at 5k level.