Might have to weigh in here.
I ride a Fuego low racer every day in central Glasgow and on open county roads. I've never had a problem with not being seen - it's a massively visible, unusual vehicle that stands out in drivers' eyes. Yeah, if you filter you can be tricky to spot, but you learn that pretty quick and adjust your riding style to suit.
Leading with your feet is also a huge safety boost. They only incident I've had is a head on slow speed job with a BMW jumping a red light (deliciously ironic...). Pedal lodged in his bumper, but certainly better than pitching over the bonnet into the windscreen.
I'm aware I'm grumbling at the messenger here. Stroppy email time methinks.