for the action of the elementary abelian group of order $8$ acting on $-\CP^{2}$, generated by the action of complex conjugation and the action of the Klein $4$-group by projective linear transformations. We equip the quotient bifold with the quotient metric of the Fubini-Study metric, so that (as in the case $n=1$) all solutions are unobstructed. A solution of action $1/32$ pulls back to a solution of action $1/4$ on the $8$-fold cover, which must be the unique instanton with holonomy group $\SO(2)$ in the $\SO(3)$ bundle with Pontryagin number $-1$ on $-\CP^{2}$. This descends to a unique bifold connection on the quotient.

We use these results about small-action moduli spaces to analyze connected sums in some particular cases. In general, given foams $\Phi
\subset X$ and $\Phi'\subset X'$ with tetrahedral points $t$, $t'$ in each, there is a connected sum $$\label{eq:tet-sum}
                 (X,\Phi) \#_{t,t'} (X',\Phi')$$ performed by removing standard neighborhoods and gluing together the resulting foams-with-boundary. Similarly, if $s$ and $s'$ are points on seams of $\Phi$ and $\Phi'$, there is a connected sum $$(X,\Phi) \#_{s,s'} (X',\Phi'),$$ and there is a connected sum for points $f$ and $f'$ in the interiors of faces of the two foams: $$(X,\Phi) \#_{f,f'} (X',\Phi'),$$

