  Quadratic gravity illustrates how a replacement for black holes can emerge
from a UV completion of gravity. 2-2-holes are extremely compact horizonless
objects with an entropy $S_{22}$ due to trapped normal matter, and in this way
they are conceptually easy to understand. But the field equations are
cumbersome and the numerical analysis has so far been restricted to relatively
small size solutions. Here we show how the properties of arbitrarily large
2-2-holes can be found, including the time delay for gravitational wave echoes
and the result $T_\infty S_{22}=M/2$. The starting point is to formulate the
metric in terms of the tortoise coordinate, and to have one of the two metric
functions be a conformal factor. A large conformally-related volume becomes
associated with the interior of a 2-2-hole. We also discuss implications for
the weak gravity conjecture.
