Savvy in the US have just sent out this
Obviously they are trying to make money but it is interesting that they believe borescoping is such a powerful tool. Most GA traditionalists think it is useless – along with oil analysis 
Peter wrote:
Most GA traditionalists
You probably mean the same ones insisting on rigidly overhauling props every 72 months and engines every 12 years?
Borescopes have made great strides in quality at ever lower prices since the start of this thread, maintenance and the way we now approach those Lycosauruses has also evolved for the better.
Even the way we now operate those engines, the more so in the uncertified world, using electronic injection/ignition, ported heads, balanced moving parts, cold air induction, etc, etc, had made the use of the same engine way more efficient than what was taught and sought possible 1/2 century ago. Luckily 
I think it’s a great initiative to try to standardize the borescope pictures. I take pictures inside my engine during every condition inspection, but I’m not really that consistent with all the angles. After two failed vividia borescopes, I’ve now got the aforementioned Teslong, and it seems fine. It’s only 1280×720 but good enough to see if the valves are burning symmetrically or not.
After the Vividia failed, I bought recently the Hiacinto Endoscope Camera with Light, 360° Two-Way Rotatable Endoscope Camera with 8.5 mm Inspection Camera, on Amazone Germany. Didn’t check it out yet but it seems better constructed then the Vividia. No more messing around with add on phones, tablets etc…! AS Peter mentioned they are all rebranded chinees stuff…
@eurogaguest1980 nice valves!!
IO390 wrote:
nice valves!!
kindly allow me to disagree… the exhaust valve does not show a uniform color on its circumference, e.g. the 2-4 o’clock orange/amber seems more marked than say the region in opposition. Either it’s due to position and/or lighting of the borescope, or it could be the forerunner of a problem… but nothing dramatic yet
There is a bit of assymetry on the exhaust valve above but really minimal. That valve looks way better than mine do!
See in the valve pictures thread for more pics. Better to post any there.
IO390 wrote:
nice valves!!
Nicest thing anyone’s said to me in a long time – thanks!
I’ll have to look more closely, taking into account Dan’s feedback, but I have to admit I did pick one of my nicer photos.
I look forward to the day when I no longer have to burn any 100LL – I use mogas or UL91 when I can, but it’s often hard to get when traveling.
Update: just got an S23 phone and the Finder borescope (above) works fine with it.
Savvy in the US have done this borescope usage video which many here should find interesting
