Bringing 4 Kerbals to Eve and back using 3 ton payloads

[bayesian_acolyte]

Here's a trip report album with lots of pictures: https://imgur.com/a/toExeBc

I did this mission for this challenge: 

The goal was to get 4 Kerbals to Eve and back with the heaviest payload launched from Kerbin being as light as possible. My heaviest payload was 3.021 tons.

A few of the mission restrictions were:

• 6 launches max
• No ISRU with Kerbals present
• No command chairs between SOI transitions
• Must launch into 40 degree inclination orbit (optional bonus)
• No parachutes (optional bonus)

Here's the craft file for the ship that was put together in orbit: https://kerbalx.com/Bayesian_Acolyte/Salvo-to-Eve-complete-ship