I bought this thing without reading the size of the tube( too big for gunsmith work) but could be very handy for you guys to look inside your motors without tearing them down. The link below is the exact borescope I've got new in box that I will sell for 300 bucks obo if your interested
http://www.fotronic.com/extech/borescopes/br136.htm
Extech BR136 Flexible Borescope New
Moderators: DJpowerHaus, mattmartindrift