I would suggest an alternative approach. Purchase a sound equipped Bachmann S4 and swap the shell with the Bachmann S2. I believe if you shop around you will find that purchasing the Sound Value S4 to be cost neutral when compared to buying the full-featured Tsunami plus speaker and enclosure. You will also find this alternative approach much easier to complete.
I have installed the T-750 in several Atlas S2 and S4 locos. I also have a couple of the Bachmann S4 sound locos. There isn't enough room in either of them to install the T-1000 (at least without doing a lot of heavy duty surgery). The plus to using the Atlas loco is weight which equates to pulling power. The Atlas frame is a very heavy chunk of cast metal. It has much more pulling power than the lighter weight Bachmann unit.
Tom
I have installed the T-750 in several Atlas S2 and S4 locos. I also have a couple of the Bachmann S4 sound locos. There isn't enough room in either of them to install the T-1000 (at least without doing a lot of heavy duty surgery). The plus to using the Atlas loco is weight which equates to pulling power. The Atlas frame is a very heavy chunk of cast metal. It has much more pulling power than the lighter weight Bachmann unit.
Tom