Hey guys,
Thanks for thoughtful comments and encouragement! Special hat tip to Ian who has sent images of his RP install to a P2K GP-30! I'm a visual learner so pictures are always most appreciated to enhance my understanding. In the comments below, I will post to the TCS decoder site as they example installs for conventional dcc.
So let me start with my locomotives. I believe the most difficult/impossible install will be to my P2K SW9. TCS recommends their M1 decoder which has the following dimensions: (L x W x H): 0.587" x 0.365" x 0.135". The LM-3 is significantly larger: 1.50 x 0.68 x 0.25 Inches and most likely will not fit. The SW9 is a sweet running little switcher but may be a candidate for selling on ebay to help pay for Rail Pro... The TCS install is here:
http://tcsdcc.com/installation/ho-scale/life-sw891200/m1I have two P2K GP30's. TCS provides recommendations for a decoder, keep alive, and a speaker. Their install involves some extensive milling of the frame which I cannot do. Their install is shown here:
http://tcsdcc.com/installation/ho-scale/life-proto-2000-gp30/wdk-kat-3 Their recommended decoder is about same size as the LM-3 so it should be relatively easy to install non-sound rail pro to the GP-30's.
I have an Atlas Trainman GP38-2. TCS recommends a decoder that is:0.969" x 0.661" x 0.193" which is a half inch shorter in length than the LM-3 or LM-3s. The link to the install is here:
http://tcsdcc.com/installation/ho-scale/atlas-trainman-gp38-2/t1p-sh I think the LM-3 will fit but I don't see room for a speaker, do you?
I have two Athearn Blue Box locomotives (GP38-2 and GP40-2). Both have been recently tuned up, electrical contact improved with the so called 5-wire fix, headlights replaced with LED's and have a nine pin JST harness. Should have plenty of room for a LM-3, not sure about a speaker. The TCS install is shown here:
http://tcsdcc.com/installation/ho-scale/athearn-gp38-2/mc2The Proto 1000 F-3A appears challenging to me since I have not soldered electronic components before. TCS has two different recommended approaches for the engine decoder, see below
Version 1 use the original board but solder connections
http://tcsdcc.com/installation/ho-scale/life-proto-1000-f3a/mc2-0Version 2 clip the wires and remove original board
http://tcsdcc.com/installation/ho-scale/life-proto-1000-f3a/mc2I don't think version one is possible with an LM-3 but perhaps version 2 would work for the F-3A?
Based on my reading these installs, I'm thinking non-sound RP should be possible for nearly all my locos except the SW9. Sound seems to stretch...