I'd go with extra thin poly cement. Great match with fiddly plastics! I really like the Tamiya brand Extra Thin bottle, as it has a really pointy and nice glue brush in the cap. However I prefer the Tamoya Limonene glue, as it's cconsiderably less smelly and headache-inducing, and supposedly a lot safer as well. So I've bough quite a few of each over the years, and use the green cap from the regular "Extra thin" in place of the orange cap from the Limonene-based version...
Also handy to have a bottle of superglue handy. Plastic glue is ususally superior, but sometimes there are gaps that could need filling with small joints, or something comes loose while the glue sets. Sometimer it's impossible to get a smooth surface to glue together with plasti cement, and then thin superglue is my best bet. Any brand should be fine, as long as you don't get a gel version most should be pretty much pure cyanoacrylate anyway...