Anyone use a borescope for cylinder inspection?

Thanks guys. What about being able to view the valves and top of cylinder? There are some that articulate 180 degrees with the turn of a knob and I assume you can view upwards with dual side camera models. Anyone have that?
My cheapo Amazon model (WiFi connection to phone) has a semi-rigid cord that I can push down against the piston and make it point up at the head…takes a little doing, I’ve had to rotate the motor to push the piston up to push closer to the head…then back down to allow the cord enough room to straighten back out. Articulating sounds cool, but costs more.