Great videos , I also went for the2 x iPhone speakers as they were relatively inexpensive per unit and were very easy to fit without having to carry out too many modifications to the loco .
Like yourself did a little research and I recently took the plunge with a NCE powercab(everything you need is in the box ) and fitted one of my 121 class and an A class with sound chips and I was blown away ! The MM141/181 require a speaker to be fitted but not that difficult either to do .
Conscious of not wanting to go too far of topic below is a picture from left of J M Designs pre 1953 covered van , Provincial Wagons post 1953 covered van and last Provincial Wagons post 1953 covered van but ‘fitted’ brake blocks on all wheels and round hand brake wheel as they would look running with Vacuum brakes .
I certainly will be ordering a LMA van or Two for variety whn they are available.
I am also discovering some wonderful gems in that IRRS flickr site there is fabulous one of a H van 18828 in green with Vacuum brakes with sliding doors by Gerard McGowan , which like you I had read about but never seen picture of one . Many thanks to Ciaran Cooney of the IRRS for painstakingly taking the time to scan these pictures , while some of them are just ordinary rolling stock photos and would not appeal to many they provide a wealth of information for the modeller .
My five sets of 2 x iPhone speakers duly arrived and fitted one to MM182 along with a GM 645 sound chip sounded a little loud when compared to my MM126 so I turned it down a little .
Great news they will look great with supertrain and Black and Tan locos I will be participating.
They will look even better in a mixed set with CIE oil wagons which is the way they operated , hint hint nudge nudge …………….
I think if you read it you will find that its 'From £2.04ea ' but when you look up the same speaker the price is pretty much the same carraige via ebay is higher and that dosent include the charge from the postman ,I will stick with dealing direct .
Ordered some on Monday from them Qty 4 plus 1 free for £35.95 incl postage which worked out at €43.99 Road and Rails took off the Vat, I had to Pay An Post a futher €13.23 in Vat and handling making a total of €57.22 so each speaker worked out at €11.45 landed at my door which is not too bad .
A great example of thrift by the railway and re cycling repurposing of rolling stock 1950s bodies on 1960s underframes which lasted until the end of the beet in 2005 .