Realize the sleep tech can't jeopardize their position by contradicting what a doctor concluded, but s/he might have some ideas or advice for you. Also, if something was overlooked in the report, s/he might be willing to talk with the doc about it on your behalf.
Realize this might be a delicate situation and they don't owe you a followup. You will be showing up at night unannounced and without an appointment. So be non-threatening, think and act as if anything good that comes from this is based on grace, and hope for the best.
Based on my own experience with my sleep lab tech, I would not hesitate to visit the tech in this manner, but if he said he couldn't talk to me I would politely say thanks and walk away. If I had a question related to the night I did my sleep study or titration study, I think he would probably take a moment with me. YMMV.
good luck sunshine