If we add a hold-off feature, the expectation (mine at least) is for precise interval timing between trigger cycles at sub ms level. Time between cycles is used for display refresh, measurement calculations, general house-keeping, checking battery level, processing user input, and periodic ground level calibration and so is not easily controlled with the current design (a special purpose trigger is probably easier to implement).
Assembly and bit flipping is the right background for this so why not get your hands dirty with the V3.1 source available for download? It is based on the IAR toolchain for ARM Cortex with its C/C++ compiler and assembler.
I may be squeezed time wise to work on this, but it shouldn’t stop anyone from wishing or requesting.