[1.3.1]Please help me with a stock propeller?

[Rakaydos]

So I picked up the Kerbal Solar Systems mod, tweakig the kerbol system and adding other stars (with planets) to visit. After some initial expirimentation, however, I discovered that severl planets, including Eve, have been given atmospheres like Jool, so dense not even aerospikes work. So before planning my grand expedition,  I need to build a lander capable of returning kerbals from the depths of such a planet.

A simple "spin the whole craft" design keeps going unstable before 1000m on kerbin.

I looked up a stock propeller tutrial on youtube, but the reaction wheel turbine dropped straight through the fairing when I released the docking port, so I'm clearly doing something wrong. Mods are KSS, Stocklike Warp Drive, and Kerbal Engineer, none of which should affect this, I would think.

Help?

Edited March 30, 2018 by Rakaydos