1) The message says ship was last seen heading out of Midnight Star but the mission director highlights Grand Exchange - and yes the TLSeeker is there.
2) When I arrive at grand exchange, a message tells me I'll need a boarding crew. The TLSeeker is blue, not red. Its Pirate escorts are all red. I do not fire on any ship at this stage.
3) 'Info' about the TLSeeker reveals no pilot. Using the freight scanner reveals it to have full loadout of shields, gauss cannons, no internal security, but with 4 marines / mercs sitting in the cargo bay.
4) I take out the remaining Pirate escorts (which have been engaged with a Phoenix). The TLSeeker stays blue.
5) I order my Cobra to board the TLS, and I bring its shields down (TLS stays blue)
6) The boarding marines arrive and this is when the TLS turns red, and attacks my Cobra, which has to be jumped out to prevent getting destroyed.
7) The TLS is captured, and immediately flys off to the Teladanium Foundry in Elysium of Light with my marines inside, and NOW HAS a pilot, Daye Gisler on board. in my message log I get the usual 'you have claimed a ship. truelight seeker the ship is yours'. But it is blue, not green.
(This is exactly what happened in the Terran Mission, where my marines were permanently kidnapped, and I don't want it to happen again ... pleasessss nooooo)
I have followed it all the way back to E.L. to confirm it's destination.
ALTERNATIVELY I have tried not boarding it, just claiming it, and the same thing occurs - except there is no stage where the TLS turns red, and the instant it is claimed, a pilot pops out of no-where and flys it off to Elysium of Light.
In both cases, each time I get the ship is yours message in the pilot log, and also the next stage of the mission to fly to another sector looking for the goner guy in a new ship now... So how do i get the TLS?
Edit: O.K. I have completed the mission. Some observations (TC 3.0):
2. Succesfull claiming will appear in your Pilot Log, but the ship will not turn green and you will not have control over the ship, nor will it appear in your property menu. Let it go.
3. It will then fly to Elysium of Light and Dock at the Teladianium Foundry built by the player for the Goners there, and immediately on docking you get a message saying the ship is now yours as reward - even if you have not completed the mission yet. Checking the Telad. Foundry confirms the ship is docked there and is now green, and that you own it.
Note: I did not check to see if the ship was still invincible after claiming, (up to that point it is) so if not, then it is possible that the ship could have bad luck and be destroyed by Xenon entering Black Hole Sun, Treasure Chest, etc (I had a Xenon migration happening in mine, just as the TLSeeker got there).
4. It takes the TLSeeker almost as long to reach Elysium of Light (at 60m/s), as it does for the player to follow the BlastClaw to Gaiaan Star, which is why it appears as if you get it as an end of mission reward - it is not. The UFJD is the end of mission reward instead. You get the True Light Seeker for 'ahem'... 'rescuing' the astronaut guy from the Pirate Base (I think), but it may be nothing to do with it. In my case, The TLS was handed over to me as soon as it docked - I happened to be checking it OOS at the time. You get the UFJD after returning with the 'goods' and destroying the P.Base..... (Seems that way ... )