SW - Stardestroyer Class 1 replacement parts

I'm looking forward to get one of the 1:4000 Star Destroyers from Rogue One.
But since they have some design flaw, amongst other things class 2 turbo laser turret, I'm making the class 1 turrets myself.

supplemental entry 1:
added ion turrets and an assemply

theoretically it should fit.
volunteer, stand forth *g*

supplemental entry 2:
added a shild projector as stand alone and to the all-together-spure