⟨06Starscraper⟩ I also just noticed today that you can put up the burn markers with TWP while planning your approach - this is useful for if you capture into a highly elliptical orbit and want to put your Venusian periapsis as close to the "burn" marker as possible to make the return trip more efficient.
(Note this screencap has a fatal mistake in it - the TWP burn/ejection angle markers are in inertial frames, and I'm plotting this in VSO - I need to plot it in VCI)
Though for this particular launch/flight time, I wasn't able to line up the Pe with the burn marker. Maybe later I'll experiment some more with
1. shorter and longer flights to Venus, maybe changing the angle I approach from, and
2. playing with departure dates some more. The Manned Venus Orbiter study looked at departing Venus just 20-40 days after arriving. In my planning, here, I was looking at staying in Venusian orbit for over a year and returning on the next window. But that might be a fatal flaw.
https://web.archive.org/web/20161228061247/http://astronautix.com/m/mannedvenusbitingmission.html
https://web.archive.org/web/20100521093323/http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19790072288_1979072288.pdf