Anyone know if the inside collar on the Wayne 70 sight glass is threaded, or just pressed in. Thanks

Jim, the collar is threaded on. If you have difficulty removing it, Park Drive Garage and I'm sure the other vendors, make a special wrench for removal. Good luck.

I'm assuming this would be the same difficulty that I encountered on the Wayne 60. If you still haven't gotten it, or for others' reference, I used a torch to heat it up and hammered a screwdriver against the fins of the nut to untwist it. They can definitely be a pain.