Wtf is an evacuator? Sounds like a medical device.You need an evacuator to drain that coolant out my man. Works like a charm. I'll be doing my radiator this fall once I get all the parts together.
Anyway I got it done. Yes those factory spring clamps are strong in that size, took a bit of effort. The bottom one is oriented down now so it can be accessed from below next time if there is a next time.
It’s hard to get a good pic.
Edit: I did clean the clamps up and painted them flat black while I was waiting to calm down so they should work better now.