lethaltoto, one more time thank you very much for your continuing interest in CCM and your input. You will have to deal with the crashes that can occur in CCM 2.4 as the wrong links for the Dreadnoughts WW II were fixed with the biq 2.45 and (mostly) not with the new mainfiles. I didn´t have the free time for doing both. I´m still working on CCM 2.5 that also includes the files for RARR and the CCM2 world scenario, but at present I´m also renovating my home. This was partly done with some really big units like WW2 battleships and WW2 Dreadnoughts, but mostly the philosophy for upgrading units in CCM2 is different: You don´t upgrade a plane by fixing jet propulsion under the wings of a biplane instead of a propeller , but by using the crew of the old planes for the new aircraft (as it frequently happened in reality). The same by upgrading to different kinds of weapons, p.e. from mounted units to vehicles and tanks ( and please no remarks about the crew of a 1.000 year old trireme, that upgrades to a caravel ).