@ twmodder - thanks for your info on this.
Latest version now added version 1_3_5 with the corrections for the add deployment node to show the accept button
Also came across a couple of other bit so sorted them.
Block tabs deliberately hides the OK button until enough actions have been completed to actually say OK to (there's some fairly complex interactions).
One item I forgot to warn, thee is an option to add a ground door. This is a step process. If you add it and try to load the game I assume it crashes as its suppose to be connected to a deployment block or a path table. Once added to one of these tables it should all be OK. Just a warning but it made more sense to me at least to keep it as a separate operation.