Yesterday I made a classic schoolboy error.
Re-filling my resin bottle, got all the old resin out, cleaned the vessel out etc.
Filled with nice new resin, all compacted down nice...
About to put the top back on...
Realised I'd forgot to put the riser tube back in! GRRR.
I managed to tunnel it in amongst the resin though after much patient spinning/ jiggling, so at least I didn't have to take it all back out again!
Note to self: in future put riser tube back in BEFORE you fill with resin!