I would think that in a compound setup the fact that the bps only goes to 50# wouldn't matter.
While I am not experienced in the least with compounds, I would think by that point the vanes would be fully open.
Wouldn't it be possible then to install a regulator to limit the amount of pressure the sensor sees just to preserve the life of the sensor?
I really need to break down and buy the software from bill so I can look at these things when the discussion comes up. This is when stuff really gets interesting!