Thanks for the reply,
I grabbed my heat gun, then put it down to double-check in the forum. Glad to have the method confirmed.
I haven't had any issues with sticking until this print. But I admit that I've relied heavily on the temps listed on the filament packaging and Cura plate defaults. This was my first time with this particular ABS, and I've since read that the default ABS plate temp is adequate for Ultimaker brand, but not hot enough for others. I'll try again w/ higher temps (and anything else that video says that I'm not already doing).
Do you have a heat gun? You need to get that mess up to about 110C. A bit hotter than boiling water. If you don't have one yet, buy a heat gun asap. A hair dryer might work actually - not sure.
Don't do unattended prints until you are an expert at getting parts to stick. Here's a (long but informative) video:
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