So I've been wondering for a long time why people kept saying "Modding 1.4 is impossible." I decided to try it myself, and it literally took me 15 minutes to get the tools needed and mod the game. Anyways, onto the actual mod.
SFS1.4 - BP editor mod.apk
This mod allows for stacking parts and rotating them now rotates in multiples of 15° rather than 90. It's the closest you could easily get to an in-game BP editor.
Update: Mod updated to allow parts to move in increments of 0.1 instead of 0.5
Instructions:
•Backup all your saves and uninstall SFS
•Download and install the new version of SFS
•Restore your backed up files
And that's it!
I plan on adding more stuff to the mod, but I'm really not the best at C#. If you'd like to make suggestions that are reasonably doable, you can post them in replies I guess.
(Note:
I was going to post this in the modding section, but this does not belong in the mod loader category as it is just a replacement APK. Also, I'm aware someone already did this, but my version is not piracy.)