Windscorpion's flagship Isometric frigate F103 Carboniferous is currently returning to the DDS following the epic New Cross mission and is said to be a very worn and battered state following extended high-speed travel and several battles against the Bolitic. Although the ILU upgrade is planned for the Isometric next year it has been decided to carry it out on Carboniferous first starting this Summer.
Though not all systems for the ILU are available such as the Z5i cannon so it could be the Carboniferous ILU will not be complete however it is needed as the ship is said to be "near fatigue collapse". It has been reported some emergency work to the main loading beams was required to allow the ship to return to Solaris under it's own steam (Windy is now using Neptune as his ship). Some have noted that Carboniferous was also used on Windy's mission against the Rectoids which was an even longer mission. A DDS Engineering source said the ship's "mileage" was much higher than the rest of the fleet!
The ILU programme will involve a total rebuild and refurbishment as well as updates to many systems including a new engine, integrated iSAS, TPM-2 launchers, OA 2.0 and an improved docking bay. Raegris CIWS 2.0 and Z5i are also intended for ILU but will not be ready until next year. Carboniferous is likely to be retrofitted with these at a later stage.
