Bleeding 4 piston calipers

I have Wilwood 4 piston calipers on my Heidts IRS and am at the point where I need to bleed them. They have 4 bleeder valves, two on top and two on the bottom. Do I have to bleed each valve? Since the valves have to be facing up when bleeding I will have to remove the calipers and flip them over to bleed the lower valves. I really don't want to pull them back out but I will not take shortcuts when it comes to brakes.

I have searched Wilwood's site, searched Stangnet and done a general web search but I can't find any info specific to 4 piston calipers. Does anyone know the procedure?

Thanks,
Brad

thanks

That's what I was hoping for. Thanks for the info.

Brad