When I'm drunk, I always get these fabulous ideas:
Imagine a 3meter long glass aquarium you bought, standing in your garage, workshop or living room.
Glue in at 1.5 meter with silicone glue a fitting piece of 8 mm glasswall which reaches 15 cm less high than the height of the other 4 walls.
Place a submersible chemistry resistant pump (cheap, low-speed) in the back of compartment 1, on top of some little glass stand (so any alu dust settling at the bottom will not be pumped to the other compartment), with eventually a small filter attached to the intake side, and a thick silicone tubing to the outlet side, leading back to the bottom of the empty compartment 2.
Fill comp.2 with all necessairy solvents and reactants, up to the top of the dividing glass wall.
Fill comp.1 (with the pump) with your calculated amount of Alu sheeting or Alu flashings, piled up with glass rods between them in the length of the aquarium compartment, to improve fluid flow between them. (No cutting needed, use big sheetstrips to fit in that compartement).
Add just enough solvent in comp.1 to cover the Alu sheets and the pump, and add your favourite Hg salt quantity. Wait until the Alu is amalgamated (or amalgamate it separately before), and start the pump.
More sophisticated chemical engineers will add a potentiometer inbetween the powerline of the pump, to be able to regulate the pumping speed and thus the exothermic reaction temperatures, or fit any sort of electric valve halfway inbetween the pump tubing to regulate flowspeeds.
No stirring needed, pumping will take care of that.
Pumping speeds will regulate the temperatures, you can always place a cooled condenser inbetween the pump tubing, to cool a too vigorous reaction, which I do not expect, btw.
Cover the top of your ongoing spectacle with thick glassplates, place your television on top and enjoy the shows at both. Don't forget the drinks and popcorn. LT/
PS: any of you who understand the danger involved in acquiring chems these days, will start trying to perfect the Alu/Hg routes, the ultimate safe route, besides the oxime route mentioned by Dr_Sister perhaps. If you have sassafras oil, the rest is reasonable safe to acquire. LT/ still drunk.
WISDOMwillWIN