I want to install a Sound Commander 2 by ERR into the tender of the Williams by Bachmann Scale Hudson--It has a tethered tender wich contains the reverse board, and TBII board & speaker

I have a few questions--

Is there enough room in the tender?
Is the existing speaker 8 ohms? 
Or will I have to get a new speaker?
Where do the reed switch and magnet go? 
How difficult is the installation?
Any help would be appreciated...

Is there any way to modify the reverse boards on WBB engines to start up in neutral==like every other loco?  I want to run lash-ups with MTH & Lionels which start in neutral.  ANd it's impossible to add a WBB to to the consist...

I bought a scale NYC Hudson on Saturday.  It is pretty impressive for the cost.  I do have two problems--the smoke unit "spits" and makes a mess-- I am using Bachman fluid--it also runs out in less than ten minutes round the track--it is very annoying & very messy--is there a secret to filling it?   

Also, more importantly, there's no chuff sound --The catalogue says whistle/ bell/chuff--I can get the whistle and bell to sound, but no chuff, what's the deal?
When the guy scanned the box, he said "Williams by Bachman NYC Scale Hudson with whistle, bell and chuff",   and commented on the price being a great deal 'for all that'... I thought so too--