One of the cool thing's about mining with DATUM (https://ocean.xyz/docs/datum) is that one can select the coinbase tags that would be visible in, say, mempool.space if you were lucky enough to mine a new block. if mining with DATUM using a pool, only the seconday tag would appear, and if solo mining with DATUM you can fill both coinbase tags. Here is an example from my DATUM service config options via Start9:

So, I'm wondering: does anyone know if there are character limits or restricted characters for these fields, whether thats a restriction related to my bitcoin node or the DATUM software?