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Hi Marijn, are you referring to these ones ?
Yes. And there is a display. Check this video I made: SpaceX Falcon Heavy tribute Orbiter Space Flight Simulator 2016 Edition - YouTube
---------- Post added at 11:23 PM ---------- Previous post was at 11:20 PM ----------
But it's part of the add-on I guess. It's not a standalone mod. But is shows how it can be done.
Would actually be a good idea to make a mod to turn that countdown clock mesh into a functional one.
Funny, I thought you made that yourself actually as I don't have the countdown on my end (strange).

; =============================================
MESH ???
; ---------------------------------------------
MATERIAL 0
EMISSIVE 0.662745 0.662745 0.662745
; ---------------------------------------------
MATERIAL 1
AMBIENT 0.000000 0.000000 0.000000
DIFFUSE 0.905882 0.905882 0.905882 1.000000
EMISSIVE 0.000000 0.000000 0.000000
BEGIN_ENVIRONMENT
System Sol
Date MJD 55278.5004612550
Script timer
Help CurrentState_img
END_ENVIRONMENT

Hi, I'm back for some Orbiter now that I have a new computer
I wanted to use this addon again and I'm glad there's a final version !
When I press K to have the popup window to enter the launch MJD date, nothing appears ? Can you confirm this ?