Thanks for your contributions orchidist. Will keep the main TEK as is for now. For people having issues will recomend drying and using fumaric as a guardrail option.

Since the water wash was saturated with sodium carb it had a high ionic strength and minimal product loss is expected. Mindlusion has confirmed this with brine washes.

Xtal formation can be tricky. There could be a wetness region where no succinate precipitates, then a slightly dryer region where larger dimescaline precipitates, then a dry region where small xtal monomescaline precipitates. Also, the excess succinic concentration could affect precipitation (excess in solution forcing the salt to crash).