So I just went with a very simple approach to avoid the collisions on models <145mm tall in hopes that Bambu will release a new start/end code sequence soon.
For my purposes, I only modified the Machine End G-Code section from:
{if (max_layer_z + 100.0) < 180}
G1 Z{max_layer_z + 100.0} F600
G1 Z{max_layer_z +98.0}
{else}
G1 Z180 F600
G1 Z180
{endif}
to:
G1 Z{max_layer_z + 5} F600
This simply raises the nozzle 5mm after the print is finished and leaves room for the movement in the Start Code of the next print.
Again, I believe this should avoid collisions on all models <145mm but be sure you know what you’re changing & test with caution.
If you want to print taller objects >145mm, the start G code will have to be modified to reduce the +Z motion. I can post where I think that should be changed if anyone wants.