I used to mess with systems with the old magic gas in them before it became illegal for mere mortals to have anything to do with R-12.
I think your 95.5 probably has R-134 which is (allegedly) much friendler to the ozone.
You can get a decent set of R-134 manifold guages from Harbor Freight Tools for under $50. If you have the older flavor, you might be out of luck since only licensed techs get to buy these things (I think!)
If your sight glass is cloudy, you are likely low on gas. You can buy R-134 at Walmart for $3-$4 per can depending on the brand.
Good Luck!
JWS