boeing247 said - Perhaps the smoke effect needs to be moved downwards too?
No you don't. The smoke effects is tied to the rockets. So if you lower the rockets, the smoke lower as well.

florence said - I hope I was clear SORRY FOR MY ENGLISH
You are doing good with your English so far, so we will do our best to help you get the rockets in the right place on the wings. :)
I'm soryy, but I do not own the Lotus Simulations L-39 Albatross. So it is hard for me to show what to change the numbers to in CSWeapon.xml :(

Mark