Uview Airlift 550000. I have had one for several years and used it multiple times without issue. It works just as easy as the attached video demonstrates. One and done. No need to drive around with the bleeder open, etc.
I'd just do it old-school. The Airlift is a great tool... gadget... but, what? You changing out your coolant every three-months?
I got my airlift for under $60CDN and I have 3 vehicles of my own I’ve used it on. Along with friends and relatives using it I more than got my money’s worth. The only downside is you need a compressor to work it. Luckily my brother in law owns one.