Liquid Plastic Weld is probably the best of the solvent glues for plastics. Place the two parts together, then brush the glue down the join. It will wick in and start bonding the joint almost immediately. Working strength in about ten to twenty minutes, full strength overnight. Humbrol Liquid Poly and Revell Contacta are slightly slower drying versions of the above, may not be quite so effective on such a wide range of plastics. Airfix type tube glues were always recommended for Harveys HFM Kits, providing a slower drying, but tougher bond, due to the thicker nature of the glues. I dont have any experience with Plasti-Zap or MekPak, or the new generation of safer solvents like the Tamiya ( orange juice?! ) cement.