When you are driving it is a bad idea to try to study a small oil gauge. The low oil pressure sensor is on these bikes for a good reason.
I think more junk just makes more possibility for issues.
Now I will say that I added a oil pressure gauge to my backhoe. It normally sits around 60 - 70PSI, if I crack it WOT for a bit it will get 100 PSI then flop back down.
I am not doing 70mph in the backhoe, and I think it is good to monitor oil pressure on an old diesel engine.
my 2 cents
2000 Vulcan Drifter 800
Roadhouse classic 2 > 1 exhaust
Okie Smokie intake config
52K miles or so, always going up
Painted flat black winter '12