Item. Reasonable posture alignment.
Item. Maintaining participation at the thihgs and knees with the momentum of the system.
Item. Sufficiently high rpm that the circularity of the system becomes intuitive. 80 seems reasonable midpoint.
Item. The uprising leg has a role to play but it is uncertain how prominent. It has a timing role which can be negative or positive. And a role in helping to support the thrust leg. In certain circumstances that may be fairly dramatic but generally it seems to be subtle.
No. As of this posting the logs from the past several days, very important, have not yet been put up. They will be under the date they were recorded.