I have never owned an LT-40 so can't comment but I do have an LT-25 and it flies almost as slow as the Senioritas I have owned. It should take more of a beating than the stick built planes too.

And most of the good upgrades are already done like tail dragger and ailerons. I converted mine to have a bolt on wing. A new flier may not want to make that mod. Mine is powered by a Magnum XLS 25 2 stroke. And what a sweet running engine it is. Too bad they seem to have been discontinued. Having the LT 25 is the only reason I haven't started the Seniorita kit I have stashed in my attic.

You could have the LT-25 framed up in a weekend of steady work. But that may not be fair. I build fast and stay on a plane until its completed. I really like to build.