When I fit got the Phrozen Shuffle XL I needed a spare resin tank. So I measured the one that I have and guessed at the FEP gasket plate and how deep it sat. I have also added two level marks. 1/4 liter and 1/2 liter so you can see just how much resin is left. There is also a pouring slot in one of the corne to make emptying easier. There is also an itall gasket that you can print up to make italling the FEP film easier. I got the concept from this video: The following are components you will need to make this work. 44x M3 x 0.5mm 304 Stainless Steel Self-Lock Nylon Ierted Hex Lock Nuts 44x DiDi/iRC M3 Titanium Gold Hex Allen Socket Flat Head Screws .005" (.127 mm) thick FEP film double sided tape