Thanks all for the helpful replies. I ended up finding a used only twice Fuji 100-400 with the 1.4tc for a great deal. I figured the extra speed will be nice in mornings and evenings and if I need the reach I have the 1.4 and I’m not sacrificing much in reach from the 150-600. Plus it’ll fit in my pack without having to buy a bigger cube.
just been messing around a little but I’m greatly impressed with the sharpness. I’m excited for the new possibilities. Just downloaded eBird so I’ll have to go bald eagle hunting this weekend.