Meade ETX telescope rear photo port - size, thread pitch and adapters

All of the classic Mead ETX telescopes (60,70,80 Refractors, 90,105,125 Maks) use a 1.375" x 24 tpi photo-port. I've found that the "Meade #64ST T-Adapter Ring 07366 for Film/Digital SLR Camera for Meade ETX-70 and Meade ETX 80" also works on Meade ETX90 and ETX-125 telescopes. BUT possibly NOT the OBSERVER lines! You can also 3D print your own 1.25" part adapter using a bike hub to 44mm 6 hole pattern brake rotor mounting piece, see this website: http://www.weasner.com/etx/3D_things/... Of course, somebody has made a 3D model of the thread adapter, but since it only costs $15, I think I'd get the aluminum one instead of trusting my camera to a 3D printed part: https://www.thingiverse.com/thing:371... My understanding is that the Celestron NexStar 4e also uses this same photoport thread size/pitch. Amazon affiliate link: 1.375"x24tpi to T2 adapter - https://amzn.to/3Lsiw1H Bicycle Hub to 44mm disk brake rotor part - https://amzn.to/3t1ZRmK