advanced fuel priority and autostrut

[farmerben]

I was playing 1.4 and using the advanced fuel flow priorities and other features of the VAB.  With the 1.6 update I can't get them.  Is there a box or something I  need to click?  Or a mod?

[4x4cheesecake]

13 minutes ago, farmerben said:

I was playing 1.4 and using the advanced fuel flow priorities and other features of the VAB.  With the 1.6 update I can't get them.  Is there a box or something I  need to click?  Or a mod?

You need to enable the 'Advanced Tweakables' in the game settings and if you play a career or science game, you also need to unlock the regular struts to use autostruts. I don't know if there is something similar for the fuel flow.