  In this technical note we present technical details on various aspects of the
framework introduced in arXiv:1401.2077 aimed at extracting effective Higgs
couplings in the $h\to 4\ell$ `golden channel'. Since it is the primary feature
of the framework, we focus in particular on the convolution integral which
takes us from `truth' level to `detector' level and the numerical and analytic
techniques used to obtain it. We also briefly discuss other aspects of the
framework.
