I have had a 3 tier stacking tiger wormery for about 6 years and after attempting several other designs prior to this one can confirm this is definitely the best! I leave the tap open and have a bucket to collect the liquid so that if I forget it for a bit it doesn’t get stinky! I have modified my wormery by adding 2 wooden blocks in the lower tiers to support the weight of the trays above which stops them getting compacted. The plastic is just starting to perish in places (and has been successfully nibbled by a rat on one occasion) so I’m going to buy some new trays. Really glad that I can do this without having to replace everything 😊