Modular ants nest with GBconnector, you can connect everything with everything in an easy way.
Also to avoid having to cut tailor-made glass, it is made to be able to use 26x76mm microscope glass.
You can also download the template of the connector for 123desing.
The tube connectors for this antnest: https://www.thingiverse.com/thing:2793681
Wall line count: 2 = 0.8mm wall