Looks like you should be able to make it work on the Compass though it may impact easy and comfortable gripping of the steering handle. You can attach the front brackets to your H-Tracks but will need additional hardware to attach the rear brackets and may need to shorten (cut) the rails a bit. You will want the aft brackets close to but in front of the rod holders so you can get nuts on the screws inside the hull. There is a YouTube video of somebody installing the regular 21" H-Rails on a Compass that shows how to access and tighten the aft brackets.

Peter

Looks like you should be able to make it work on the Compass though it may impact easy and comfortable gripping of the steering handle. You can attach the front brackets to your H-Tracks but will need additional hardware to attach the rear brackets and may need to shorten (cut) the rails a bit. You will want the aft brackets close to but in front of the rod holders so you can get nuts on the screws inside the hull. There is a YouTube video of somebody installing the regular 21" H-Rails on a Compass that shows how to access and tighten the aft brackets.

Peter

Oh, sorry. Yes the 2020 Compass has the molded rod holders rather than drop in. You could install a 6" rear hatch. Aside from the utility of the hatch for storage, it would greatly open up the area where you can reach inside the hull to mount accessories.

The rear bracket for the Lynx H-Rail mount kit attaches with a single screw for a tapped hole built into the Lynx. So you will just need to drill a hole and use some appropriate washers and nuts to secure from inside. If the screws aren't long enough then you might need longer screws. Use decent sized washers to spread the load. I use red Loctite on all in-hull hardware.

If it were me, I'd buy the kit, carefully assemble and lay the left rail and brackets on the kayak, and see how they might interfere with the steering handle, and how the length is. Also, the rails are curved so you want to make sure that curve works with the Compass shape. If all good, proceed. If not, return for refund (thus the careful handling of parts). I think this would be a great addition to a Compass if it doesn't interfere with steering. Though the kit seems to be a bit hard to find right now.

I expected Hobie to switch the rails in the 9" and 21" H-Rail kits to the style with a built-in H-Track on top but that hasn't happened yet. If the 21" rail were available this way, it is a nice fit on the Compass and can be installed such that it does not interfere with the steering handle. If you just want a raised H-Track and aren't going to use H-Rail accessories, you could just install the Ram Hand-Track rails though I have not verified they are accessory-compatible with Hobie mounts.

Peter

Unless I am missing something, you would still need access inside the hull to tighten nuts were you to install the 12" flat track kit.

Peter

That should work. If it were me, I would probably mount the rear H-Rail bracket using an appropriate screw through the track and into one of the track backing plate threaded screw holes.

The only problem I see is that the Lynx tracks are recessed flush into the hull such that the H-Rail kit mounts flush against the hull at each end. The Compass track is raised as will be the rear tracks you add. Not sure how the H-Rail brackets will lay and look.

Peter

I think it will look just fine on the existing track and the one you will add.

I almost never use well nuts. Not a fan. But I have had to do some crazy things instead. Like live video in the hull while I maneuver a ratchet duck taped upright to a 3' piece of PVC pipe with a 1' extension to the socket while a friend turns the screw on the outside. I have also fabricated and tapped my own threaded backing plates then used string tied to a washer to position them.

Peter