Our dear volutar made a patch to fix the timeunit preview for 2x2 tanks and optimize its handling.
I implemented the patch from:
http://volutar.myds.me/05_doors.patchI merged it into my branch here:
https://github.com/hellrazor4223/OpenXcom/commit/9b488f02828f22ab5e619054d2734872ca772747Took some work, but it works, even thou i already found a case were there is some issue.
See screenshots attached.
screen014 and screen015 show that the preview now work correctly.
on screen016 and screen017 there is a slight bug, the preview shows that 4 TU more are consumed then there actually are used. Maybe volutar could take a look at this again.