Like the T tail thingy (I thot it was a TV antenna!) on the pattern planks, the vertical location of the horizontal tailplane is -in my book- highly over analyzed.
As is much of the solemn advice of changing angles of incidence - (usually in degrees ) fancy that -
Do any of these guys realize that ONE degree is almost 1/4"in one foot??
A full scale craft such as the Dalotel may have the inclined at say 2-3 degrees - BUT that does not mean that the wing flies at 2.3 degrees AOA.
When we designed (dare I sayt hat?) a pair of Zlin Z 50's for the TOC in 1976(?) for D Brown- I elected to put both the wing and stab at the same angles (0 decalage) BUT they were also tipped down relative to the original setup
This made the fuselage fly a little lower at the rear.
May have been a waste of time but the models flew well..