Years ago when i had a C8 i tried it once during the day for watching a distant coyote pack. Nice views with significant heat distortion though (100x).
During mid a.m. to late afternoon, on a sunny day, the exit pupil of your eye stays at 2mm pretty much.
Nowdays, my primary day scopes are:
an old B&L Elite LER 60mm spotter with a fixed 22x occular. View seldom affected by ground heat.
A 65mm ED spotter with a 12mm occular for 33x, which seems to work the best during most conditions.
A post 2010 C90 @ 62x, for gray days and nest viewing. Heat distortion very apparent on a sunny day, with more distant targets.
I saw a visitor at a raptor migration site once, with a C8 on its fork :o
He seemed to be having problems, not having a hawk setting on the drive and all