I suspect the guy have only more experience than most, how many stuck seatpost each of us dealt with? 0, 1 or maybe 2 when the guy do that all year around with various frames.
It's exactly like welding, you can do an OK job in 20mins when you weld few times per year but someone welding all day can do an awesome job in few seconds. He use the same methods but with much more experience so know already what should and shouldn't work before to start.
A bit like those metal bender who bend a bump in a car door without painting, only a matter of practicing.
I suspect the guy have only more experience than most, how many stuck seatpost each of us dealt with? 0, 1 or maybe 2 when the guy do that all year around with various frames.
It's exactly like welding, you can do an OK job in 20mins when you weld few times per year but someone welding all day can do an awesome job in few seconds. He use the same methods but with much more experience so know already what should and shouldn't work before to start.
A bit like those metal bender who bend a bump in a car door without painting, only a matter of practicing.