All sa-handling removed. I find neither the selmaho nor the construct version of sa-handling very satisfactory, and it adds horrible complication to the grammar, so I'm removing it for now.
The construct free* allowed wherever indicators are allowed. It doesn't make sense to restrict it on the grounds that it can be too long and thus interrupt certain tight constructs, because indicators themselves can be made as long as desired. The only required exception is that, for obvious reasons, "(number / lerfu-string) MAI#" can't be attached to PA# and BY#, and vocatives can't be attached to COI# and DOI#.