to add my tuppenceworth:-
I’m not a fan of dichloromethane solvent or any of the liquid cements alone, since they don’t have any gap filling abilities. ( lets say the end of a tube is not quite square or true, a plate is not perfectly flat, or has a small chip in the edge ) and you are kind of at the mercy of where the solvent flows rather than where you want it to go!
For critical structural joints i would recommend TENSOL 70 acrylic cement which has proved itself for me over many years for perspex assembly. readily available in UK from trade plastics suppliers.
TENSOL 70 is a two part( resin and catalyst ) that produces a proper structural bond.
its quite viscous and doesn’t produce a white bloom on the material.( unless you clean off excess from an area in which case it will of course damage the surface finish of the part )
its not cheap though ( i think 500ml is standard size) ,but you can just mix up enough to carry out the task in hand. and do consider that it is extremely evil from a fumes perspective, as with many of these types of adhesives. DO NOT use in an enclosed space or without adequate ventilation & i would not recommend it if you are particularly sensitive to strong chemical smells!
it can also produce some heat when curing so dont be alarmed when it gets hot!
it’s probably similar / same to what is sold by Evonik (plexiglass ) / Tensol ( perspex )