Customer support was initially responsive, but didn't help any with troubleshooting. They also never responded to my last email asking for troubleshooting tips for making their device extract engine oil from my Buick. They just said what not to do, and implied I was out of luck for getting the oil out of my Buick through the dipstick in the last email I received from them. Even an acknowledgement that I'm on my own for liability reasons would have been nice, and understandable from their point of view.
Rats on Lincoln for not following through on the customer support side. Disappointing from my perspective.
I found some more flexible hose at Lowe's. I'll try that at the next oil change, and see if it works. I totally understand I'm on my own for this, and if it gets stuck in the dipstick tube, then it's my fault, not Lincoln's.