I would like to upgrade a Kato n scale SD70ACe with a sound decoder with as little modification as possible.  I have made attempt with a Loksound 73100.  A company by the name of Ajckids.com has ESU Loksound 73825 for sale.  This is the decoder that has been specially factory fitted in the Kato RTR n scale DCC locos with sound.  So, I assume this is the decoder that will fit with little or no modification.

I would just like to know whether anyone has any experience with this decoder.