On big end bearings . It seems that INA cages were used in recent years also by ALPHA but these German made bearing assemblies have dried up . Prince used them as well I think while available . Not aware of what is available at the moment .
I'd accept what DavidD says as he is a racer to his boot straps and keeps right up with whats current and best . No doubt about his knowledge being cutting edge .
The Works used alloy cages with tripple quarter by quarter inch rollers , three in each slot . Proved on the Picador and fitted to all Black Lightnings . Together with Vibrac rods this was the top setup , and this big end along with a double speed pump worm gives excellent service for racing and fast road work . It was used in my drag bike for several years of regular racing , and before that for fast street riding over a large mileage without any bother or replacements . Sid .
