Large Scale Central

Easy-to-fit QSI sound in large scale?

Having just fitted a QSI sound system in one of my Aristo dash 9 locos as a trial, and been VERY pleased with the multiple effects I can get from using the little hand-held sound trigger box, I was wondering if there are any similarly easy to fit QSI sound systems that I would be able can install in a few of my other locos, starting with a favourite steamy of mine, the LGB Forney.

As I run on a number of other layouts that do not have large-scale DCC, this seems to me to be THE way ahead at an affordable price - I have fifteen Dash 9, SD45 and FA, a few GP7/9, and a couple of GP38s, as well as one of every geared loco that Bachmann make, except the three-truck Shay and twenty something other LGB lcocs of one kind or another.

TIA

tac