I was really happy to sell my Portable and get a Core with the
money.

But the 24 is carbon fiber; so the antennae have to be mounted
just below the canopy forward on the glareshield. Coverage on
my 27 is good from that location.

Admittedly the Portable can sit on top of the glareshield and
obtain half decent coverage with a minimum of fiddling.

With the Core you need to set up an antenna platform, perhaps
cut a hole in the glareshield and be careful reinstalling the
canopy after working on the instruments.

For the financially challenged, a Kobo can run Top Hat (XCSoar
variant) which displays Flarm targets for perhaps less than a
Flarmview or Butterfly display.