It is a lot of fun when it works. Not all woods will take resin, at least not without special preparations.
I generaly run 5 or 6 tanks every time I do a batch. That amounts to about 30 risers at a time. Takes a lot of resin.
Here's a tip, fill your tanks with as much wood as they will hold, but don't wedge the wood in. It will get stuck after taking in resin. The fuller the tank, the less room for resin. If you only put in a couple of pieces, it will take a lot more resin to cover them up.
BigJim