Recipes not showing up in crafting menu

[mofakid]

hi there, first time poster here.
my problem is that some recipes like gates or tanks dont show up in the menu. i am pretty sure i used them before on a different save, a couple of weeks ago.
i have almost everything researched and checked the crafting tabs several times.
it might very well be, that im missing something obvious here, so it would be very much apreciated if someone could put the finger on it.

[FishSandwich]

A screenshot or a copy of the save would help.

[mofakid]

thanks for the offer to help. just found the problem... after reinstalling i left the alpha updates unchecked....