I've been using Mr Cement S for small parts as it flows very easily from the small brush applicator and dries invisibly. The range of Vitalbond CA glues from Boyes (thick, med, thin) is for general gluing and the odd plastic that refuses to let "superglues" work thei magic get the Revel Contacta treatment. There's loads of science involved but I really CBA with all that blx and not being a collector of lotions and potions so unless someone I know personally has recommended it and lets me have a go, I stick to what is familiar. Comments about (no) puns intended are not required!