Question Stiff throttle assembly - Carbon Cub FX-3

[Neal]

I'll put this out there to get opinions as I started my condition inspection and it's time to figure this out. Since delivery of my FX-3 nearly two years ago the throttle travel has friction, even with the friction knob completely in the loose position. It's not like my prior plane where with loose friction there was a much easier travel of the throttle lever. I asked this question not long after delivery and it was suggested it's the nut/bolt too tight which joins the front and rear throttle assemblies. The other option is something in the throttle body itself but I will take the lower risk approach of removing the left interior panel (not fun) and check the assembly.

I'm open to any suggestions as to what could cause, or most likely be the cause, of this friction situation. I'd like to have it very loose with friction knob backed off and then be able to adjust my desired friction using the friction adjustment.