upthrust on a Giles?
sounds like an underpowered setup or the measuring stick is off.
The only time we found low wing-high thrustline setups to need up thrust -- was on models which lost speed on uplines
lose of speed = need for upthrust
same situation as as in level flight .
when we wre testing this -it was on a TOC design - increasing thrust (more power)-solved the problem
If speed remains the same -- trim remains the same - made sense to me

what do ya think?