Our Vividia Ablescope 180 degree articulating borescopes are quite popular among aviation mechanics/technicians, airplane owners and pilots who do most of their airplane maintenance. One place we can meet many aviation maintenance mechanics/technicians is the annual aviation training classes or seminars.
There are many aviation maintenance / IA renewal training classes in US organized by difference groups. Here is the database on FAA website, where you can do search to find out more information about each training seminars. Some seminars require to register online from FAA website.
The IA renewal training courses are provided many experts from FAA, aviation service providers, aviation magazines, aviation associations, aviation product manufacturers, and training institutions. Here are some courses listed by FAA.

2018-02-15_master_ia_refresher_course_database_approved_by_faa.pdf |
Concorde Batteries organizes several IA renewal seminars and they compiled a good list of aviation maintenance training classes on their website.
We have great borescopes for general aviation airplane engines (piston engines), and we also have some smaller diameter, long articulating borescopes for jet airplane engines. We welcome you to give us suggestions on how to improve our products. You can call us at 864-469-0919 or send us email at info@oasisscientific.com