Use "B" for Blunt Trim (Adds 1" to overall dimension) 
Use "R" for Ramp Trim (Adds Custom Safety PDF Custom Safety EXAMPLE 2.5" to overall dimension) 
OPTIONAL: Use "J" for Joining Trim 
Custom Cusstom Custom Saffety Custom Safety EXAMPLE Custom Safety EXAMPLE EXAMPLE Safety PDF Safety (Adds 1" to overall dimension)