Tonight, I made my attempt at about 7pm, more than 90 minutes before sunset.
I set up my mount (EQ-3) on my back patio, pointed north; then set the declination to Jupiter's location using the setting circles (which could stand to be recalibrated). After a few minutes of hunting back and forth, a pale circle appeared in my finder scope, standing out against the bright blue sky.
This is with my C6 SCT, TeleVue 2x barlow, Canon T4i w/ Magic Lantern raw video. ISO 1600, 1/60s, 30fps, 1350/2700 frames
Not a very good image, but I'm quite pleased with myself being able to locate an astronomical object in daylight. I may actually attempt to nab that triple transit this summer.