I enjoy building, so see ARTFs as a waste of money, as where is the enjoyment in assembling one of them?
Just to see what it was like, I recently bought and assembled an ARTF - Flair Lark - and it just proved my point to myself.
It does fly well (now that I am starting to trim it properly) but I didn't get much satisfaction from building, and have no attachment to it.
Also it is WAY too heavy for both its size and suggested engines. 46? LOL I have put my 61 FX in it with a Just Engines purple pipe, and it still runs out of steam on long verticals.
So Archie, and Malcolm, stick to expanding your range (ie 140

), rather than catering to all those that can't build.