[Gaz64]

You'll only ever do that once, seen it a few times.

I have used a cooling system adaptor to pressurise the clutch master, say 3psi, which helps the master "prime" better.

For some reason, until the master is completely primed it pulls air as well as fluid, but it doesn't push all the air down to the slave, so it appears to bled correctly, but still has a spongy pedal.

I hate the Commodore setup, (master cylinder design, reservoir too small, pressure fluid line too small etc). Hopefully you have improved on that.

I hope this helps.