Hi everyone, I'm trying to install my Jotul F500 Oslo and connect to Selkirk double-wall stove pipe (DSP) but I'm not sure that the DSP is seating properly in the flue collar. If I use a regular length of DSP, I can get about 3/4"-1" of the inner pipe into the flue collar with the outer layer of pipe going outside the flue collar. But the outside of the pipe comes up short of the two screw holes in the Jotul flue collar so I wouldn't have a place to screw into. Does this sound right, or does this stove require an adapter of some kind to accept the DSP? For what it's worth, I tried using a telescoping length, but that wouldn't fit inside or outside, it just seemed to butt up against the flue collar. I can answer more questions or post pictures. Thanks so much for any help!