Welcome to Brian's Workshop
Check out his Dust Collection attachments (Click Here)
New Project to mount a TSU-PNP decoder in an
Athearn Ready To Roll SD45 as sold
SD45 removing the stock board note the motor clip 
SD45 with stock light board removed
mount could cover(around) the top of the motor
SD45 with TSU-PNP board 
Top down Front to the left
Dimensions SD45 motor and decoder
Motor Top L=1.375”
Brass Tab Width =.190”
Plastic width = .288”
Front Motor Tab L=.154”
Rear Motor Tab L=.2315”
Front plastic to Front tab = .012”
Front of front tab to rear of rear tab = 1.103”
Motor Front to Back = .8745”
Brass between tabs = .630”
Motor Width = .710” (plastic is close )
Rear plastic Width = .280”
Rear plastic Length = .440” (with Brass clip)
Total Space between castings = 3”
Side of motor Front to the left
TSU-PNP decoder Front to the left
TSU-PNP PC Board
Useable length = 2.580”
Useable width = .316”
Total width = .665”
Space between open spaces = 1.200”
Rear tab width =.242”
Front Tab Width = .316”
Small center opening extension width =.081”
Opening F to B with extension = .165”
Opening F to B without extension =.095”
The yellow space is opening for snap in parts
Updated 04/29/18
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